Merge branch 'prototype-1.7.3' into 'master'

lib: Upgrade Prototype from 1.7 to 1.7.3

Are you sure you want these as separate merge requests?  The rest of the upgrades are much less invasive than Dojo, with essentially no changes outside of `lib`.  I would of course leave them as separate commits in any case, but I had assumed they would be more convenient to test in one batch.

See merge request !39

1 files changed, 3567 insertions, 2061 deletions

diff --git a/lib/prototype.js b/lib/prototype.js
index 2822c16c8..d9bbc6e80 100644
--- a/lib/prototype.js
+++ b/lib/prototype.js
@@ -1,6 +1,6 @@
 // Modified document.on() to modified.p_on() to fix compatibility with Dojo -fox
 
-/*  Prototype JavaScript framework, version 1.7
+/*  Prototype JavaScript framework, version 1.7.3
  *  (c) 2005-2010 Sam Stephenson
  *
  *  Prototype is freely distributable under the terms of an MIT-style license.
@@ -10,7 +10,7 @@
 
 var Prototype = {
 
-  Version: '1.7',
+  Version: '1.7.3',
 
   Browser: (function(){
     var ua = navigator.userAgent;
@@ -51,7 +51,7 @@ var Prototype = {
     })()
   },
 
-  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
+  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script\\s*>',
   JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,
 
   emptyFunction: function() { },
@@ -61,27 +61,6 @@ var Prototype = {
 
 if (Prototype.Browser.MobileSafari)
   Prototype.BrowserFeatures.SpecificElementExtensions = false;
-
-
-var Abstract = { };
-
-
-var Try = {
-  these: function() {
-    var returnValue;
-
-    for (var i = 0, length = arguments.length; i < length; i++) {
-      var lambda = arguments[i];
-      try {
-        returnValue = lambda();
-        break;
-      } catch (e) { }
-    }
-
-    return returnValue;
-  }
-};
-
 /* Based on Alex Arnell's inheritance implementation. */
 
 var Class = (function() {
@@ -143,8 +122,13 @@ var Class = (function() {
           return function() { return ancestor[m].apply(this, arguments); };
         })(property).wrap(method);
 
-        value.valueOf = method.valueOf.bind(method);
-        value.toString = method.toString.bind(method);
+        value.valueOf = (function(method) {
+          return function() { return method.valueOf.call(method); };
+        })(method);
+
+        value.toString = (function(method) {
+          return function() { return method.toString.call(method); };
+        })(method);
       }
       this.prototype[property] = value;
     }
@@ -162,6 +146,7 @@ var Class = (function() {
 (function() {
 
   var _toString = Object.prototype.toString,
+      _hasOwnProperty = Object.prototype.hasOwnProperty,
       NULL_TYPE = 'Null',
       UNDEFINED_TYPE = 'Undefined',
       BOOLEAN_TYPE = 'Boolean',
@@ -179,6 +164,18 @@ var Class = (function() {
         JSON.stringify(0) === '0' &&
         typeof JSON.stringify(Prototype.K) === 'undefined';
 
+
+
+  var DONT_ENUMS = ['toString', 'toLocaleString', 'valueOf',
+   'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', 'constructor'];
+
+  var IS_DONTENUM_BUGGY = (function(){
+    for (var p in { toString: 1 }) {
+      if (p === 'toString') return false;
+    }
+    return true;
+  })();
+
   function Type(o) {
     switch(o) {
       case null: return NULL_TYPE;
@@ -215,9 +212,7 @@ var Class = (function() {
   }
 
   function Str(key, holder, stack) {
-    var value = holder[key],
-        type = typeof value;
-
+    var value = holder[key];
     if (Type(value) === OBJECT_TYPE && typeof value.toJSON === 'function') {
       value = value.toJSON(key);
     }
@@ -237,7 +232,7 @@ var Class = (function() {
       case false: return 'false';
     }
 
-    type = typeof value;
+    var type = typeof value;
     switch (type) {
       case 'string':
         return value.inspect(true);
@@ -246,7 +241,9 @@ var Class = (function() {
       case 'object':
 
         for (var i = 0, length = stack.length; i < length; i++) {
-          if (stack[i] === value) { throw new TypeError(); }
+          if (stack[i] === value) {
+            throw new TypeError("Cyclic reference to '" + value + "' in object");
+          }
         }
         stack.push(value);
 
@@ -288,10 +285,17 @@ var Class = (function() {
     if (Type(object) !== OBJECT_TYPE) { throw new TypeError(); }
     var results = [];
     for (var property in object) {
-      if (object.hasOwnProperty(property)) {
+      if (_hasOwnProperty.call(object, property))
         results.push(property);
+    }
+
+    if (IS_DONTENUM_BUGGY) {
+      for (var i = 0; property = DONT_ENUMS[i]; i++) {
+        if (_hasOwnProperty.call(object, property))
+          results.push(property);
       }
     }
+
     return results;
   }
 
@@ -385,13 +389,27 @@ Object.extend(Function.prototype, (function() {
     return names.length == 1 && !names[0] ? [] : names;
   }
 
+
   function bind(context) {
-    if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
+    if (arguments.length < 2 && Object.isUndefined(arguments[0]))
+      return this;
+
+    if (!Object.isFunction(this))
+      throw new TypeError("The object is not callable.");
+
+    var nop = function() {};
     var __method = this, args = slice.call(arguments, 1);
-    return function() {
+
+    var bound = function() {
       var a = merge(args, arguments);
-      return __method.apply(context, a);
-    }
+      var c = this instanceof bound ? this : context;
+      return __method.apply(c, a);
+    };
+
+    nop.prototype   = this.prototype;
+    bound.prototype = new nop();
+
+    return bound;
   }
 
   function bindAsEventListener(context) {
@@ -441,16 +459,20 @@ Object.extend(Function.prototype, (function() {
     };
   }
 
-  return {
+  var extensions = {
     argumentNames:       argumentNames,
-    bind:                bind,
     bindAsEventListener: bindAsEventListener,
     curry:               curry,
     delay:               delay,
     defer:               defer,
     wrap:                wrap,
     methodize:           methodize
-  }
+  };
+
+  if (!Function.prototype.bind)
+    extensions.bind = bind;
+
+  return extensions;
 })());
 
 
@@ -544,6 +566,11 @@ Object.extend(String.prototype, (function() {
     return function(match) { return template.evaluate(match) };
   }
 
+  function isNonEmptyRegExp(regexp) {
+    return regexp.source && regexp.source !== '(?:)';
+  }
+
+
   function gsub(pattern, replacement) {
     var result = '', source = this, match;
     replacement = prepareReplacement(replacement);
@@ -551,13 +578,14 @@ Object.extend(String.prototype, (function() {
     if (Object.isString(pattern))
       pattern = RegExp.escape(pattern);
 
-    if (!(pattern.length || pattern.source)) {
+    if (!(pattern.length || isNonEmptyRegExp(pattern))) {
       replacement = replacement('');
       return replacement + source.split('').join(replacement) + replacement;
     }
 
     while (source.length > 0) {
-      if (match = source.match(pattern)) {
+      match = source.match(pattern)
+      if (match && match[0].length > 0) {
         result += source.slice(0, match.index);
         result += String.interpret(replacement(match));
         source  = source.slice(match.index + match[0].length);
@@ -595,7 +623,7 @@ Object.extend(String.prototype, (function() {
   }
 
   function stripTags() {
-    return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?>|<\/\w+>/gi, '');
+    return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?(\/)?>|<\/\w+>/gi, '');
   }
 
   function stripScripts() {
@@ -611,7 +639,7 @@ Object.extend(String.prototype, (function() {
   }
 
   function evalScripts() {
-    return this.extractScripts().map(function(script) { return eval(script) });
+    return this.extractScripts().map(function(script) { return eval(script); });
   }
 
   function escapeHTML() {
@@ -632,7 +660,10 @@ Object.extend(String.prototype, (function() {
         var key = decodeURIComponent(pair.shift()),
             value = pair.length > 1 ? pair.join('=') : pair[0];
 
-        if (value != undefined) value = decodeURIComponent(value);
+        if (value != undefined) {
+          value = value.gsub('+', ' ');
+          value = decodeURIComponent(value);
+        }
 
         if (key in hash) {
           if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
@@ -705,7 +736,7 @@ Object.extend(String.prototype, (function() {
 
   function evalJSON(sanitize) {
     var json = this.unfilterJSON(),
-        cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+        cx = /[\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff\u0000]/g;
     if (cx.test(json)) {
       json = json.replace(cx, function (a) {
         return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
@@ -726,12 +757,17 @@ Object.extend(String.prototype, (function() {
     return this.indexOf(pattern) > -1;
   }
 
-  function startsWith(pattern) {
-    return this.lastIndexOf(pattern, 0) === 0;
+  function startsWith(pattern, position) {
+    position = Object.isNumber(position) ? position : 0;
+    return this.lastIndexOf(pattern, position) === position;
   }
 
-  function endsWith(pattern) {
-    var d = this.length - pattern.length;
+  function endsWith(pattern, position) {
+    pattern = String(pattern);
+    position = Object.isNumber(position) ? position : this.length;
+    if (position < 0) position = 0;
+    if (position > this.length) position = this.length;
+    var d = position - pattern.length;
     return d >= 0 && this.indexOf(pattern, d) === d;
   }
 
@@ -773,8 +809,8 @@ Object.extend(String.prototype, (function() {
     isJSON:         isJSON,
     evalJSON:       NATIVE_JSON_PARSE_SUPPORT ? parseJSON : evalJSON,
     include:        include,
-    startsWith:     startsWith,
-    endsWith:       endsWith,
+    startsWith:     String.prototype.startsWith || startsWith,
+    endsWith:       String.prototype.endsWith || endsWith,
     empty:          empty,
     blank:          blank,
     interpolate:    interpolate
@@ -821,11 +857,8 @@ var $break = { };
 
 var Enumerable = (function() {
   function each(iterator, context) {
-    var index = 0;
     try {
-      this._each(function(value) {
-        iterator.call(context, value, index++);
-      });
+      this._each(iterator, context);
     } catch (e) {
       if (e != $break) throw e;
     }
@@ -844,9 +877,9 @@ var Enumerable = (function() {
     iterator = iterator || Prototype.K;
     var result = true;
     this.each(function(value, index) {
-      result = result && !!iterator.call(context, value, index);
+      result = result && !!iterator.call(context, value, index, this);
       if (!result) throw $break;
-    });
+    }, this);
     return result;
   }
 
@@ -854,9 +887,9 @@ var Enumerable = (function() {
     iterator = iterator || Prototype.K;
     var result = false;
     this.each(function(value, index) {
-      if (result = !!iterator.call(context, value, index))
+      if (result = !!iterator.call(context, value, index, this))
         throw $break;
-    });
+    }, this);
     return result;
   }
 
@@ -864,28 +897,28 @@ var Enumerable = (function() {
     iterator = iterator || Prototype.K;
     var results = [];
     this.each(function(value, index) {
-      results.push(iterator.call(context, value, index));
-    });
+      results.push(iterator.call(context, value, index, this));
+    }, this);
     return results;
   }
 
   function detect(iterator, context) {
     var result;
     this.each(function(value, index) {
-      if (iterator.call(context, value, index)) {
+      if (iterator.call(context, value, index, this)) {
         result = value;
         throw $break;
       }
-    });
+    }, this);
     return result;
   }
 
   function findAll(iterator, context) {
     var results = [];
     this.each(function(value, index) {
-      if (iterator.call(context, value, index))
+      if (iterator.call(context, value, index, this))
         results.push(value);
-    });
+    }, this);
     return results;
   }
 
@@ -898,14 +931,14 @@ var Enumerable = (function() {
 
     this.each(function(value, index) {
       if (filter.match(value))
-        results.push(iterator.call(context, value, index));
-    });
+        results.push(iterator.call(context, value, index, this));
+    }, this);
     return results;
   }
 
   function include(object) {
-    if (Object.isFunction(this.indexOf))
-      if (this.indexOf(object) != -1) return true;
+    if (Object.isFunction(this.indexOf) && this.indexOf(object) != -1)
+      return true;
 
     var found = false;
     this.each(function(value) {
@@ -927,8 +960,8 @@ var Enumerable = (function() {
 
   function inject(memo, iterator, context) {
     this.each(function(value, index) {
-      memo = iterator.call(context, memo, value, index);
-    });
+      memo = iterator.call(context, memo, value, index, this);
+    }, this);
     return memo;
   }
 
@@ -943,10 +976,10 @@ var Enumerable = (function() {
     iterator = iterator || Prototype.K;
     var result;
     this.each(function(value, index) {
-      value = iterator.call(context, value, index);
+      value = iterator.call(context, value, index, this);
       if (result == null || value >= result)
         result = value;
-    });
+    }, this);
     return result;
   }
 
@@ -954,10 +987,10 @@ var Enumerable = (function() {
     iterator = iterator || Prototype.K;
     var result;
     this.each(function(value, index) {
-      value = iterator.call(context, value, index);
+      value = iterator.call(context, value, index, this);
       if (result == null || value < result)
         result = value;
-    });
+    }, this);
     return result;
   }
 
@@ -965,9 +998,9 @@ var Enumerable = (function() {
     iterator = iterator || Prototype.K;
     var trues = [], falses = [];
     this.each(function(value, index) {
-      (iterator.call(context, value, index) ?
+      (iterator.call(context, value, index, this) ?
         trues : falses).push(value);
-    });
+    }, this);
     return [trues, falses];
   }
 
@@ -982,9 +1015,9 @@ var Enumerable = (function() {
   function reject(iterator, context) {
     var results = [];
     this.each(function(value, index) {
-      if (!iterator.call(context, value, index))
+      if (!iterator.call(context, value, index, this))
         results.push(value);
-    });
+    }, this);
     return results;
   }
 
@@ -992,9 +1025,9 @@ var Enumerable = (function() {
     return this.map(function(value, index) {
       return {
         value: value,
-        criteria: iterator.call(context, value, index)
+        criteria: iterator.call(context, value, index, this)
       };
-    }).sort(function(left, right) {
+    }, this).sort(function(left, right) {
       var a = left.criteria, b = right.criteria;
       return a < b ? -1 : a > b ? 1 : 0;
     }).pluck('value');
@@ -1144,7 +1177,7 @@ Array.from = $A;
 
   function intersect(array) {
     return this.uniq().findAll(function(item) {
-      return array.detect(function(value) { return item === value });
+      return array.indexOf(item) !== -1;
     });
   }
 
@@ -1162,41 +1195,190 @@ Array.from = $A;
   }
 
   function indexOf(item, i) {
-    i || (i = 0);
-    var length = this.length;
-    if (i < 0) i = length + i;
-    for (; i < length; i++)
-      if (this[i] === item) return i;
+    if (this == null) throw new TypeError();
+
+    var array = Object(this), length = array.length >>> 0;
+    if (length === 0) return -1;
+
+    i = Number(i);
+    if (isNaN(i)) {
+      i = 0;
+    } else if (i !== 0 && isFinite(i)) {
+      i = (i > 0 ? 1 : -1) * Math.floor(Math.abs(i));
+    }
+
+    if (i > length) return -1;
+
+    var k = i >= 0 ? i : Math.max(length - Math.abs(i), 0);
+    for (; k < length; k++)
+      if (k in array && array[k] === item) return k;
     return -1;
   }
 
+
   function lastIndexOf(item, i) {
-    i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
-    var n = this.slice(0, i).reverse().indexOf(item);
-    return (n < 0) ? n : i - n - 1;
+    if (this == null) throw new TypeError();
+
+    var array = Object(this), length = array.length >>> 0;
+    if (length === 0) return -1;
+
+    if (!Object.isUndefined(i)) {
+      i = Number(i);
+      if (isNaN(i)) {
+        i = 0;
+      } else if (i !== 0 && isFinite(i)) {
+        i = (i > 0 ? 1 : -1) * Math.floor(Math.abs(i));
+      }
+    } else {
+      i = length;
+    }
+
+    var k = i >= 0 ? Math.min(i, length - 1) :
+     length - Math.abs(i);
+
+    for (; k >= 0; k--)
+      if (k in array && array[k] === item) return k;
+    return -1;
   }
 
-  function concat() {
-    var array = slice.call(this, 0), item;
-    for (var i = 0, length = arguments.length; i < length; i++) {
-      item = arguments[i];
+  function concat(_) {
+    var array = [], items = slice.call(arguments, 0), item, n = 0;
+    items.unshift(this);
+    for (var i = 0, length = items.length; i < length; i++) {
+      item = items[i];
       if (Object.isArray(item) && !('callee' in item)) {
-        for (var j = 0, arrayLength = item.length; j < arrayLength; j++)
-          array.push(item[j]);
+        for (var j = 0, arrayLength = item.length; j < arrayLength; j++) {
+          if (j in item) array[n] = item[j];
+          n++;
+        }
       } else {
-        array.push(item);
+        array[n++] = item;
       }
     }
+    array.length = n;
     return array;
   }
 
+
+  function wrapNative(method) {
+    return function() {
+      if (arguments.length === 0) {
+        return method.call(this, Prototype.K);
+      } else if (arguments[0] === undefined) {
+        var args = slice.call(arguments, 1);
+        args.unshift(Prototype.K);
+        return method.apply(this, args);
+      } else {
+        return method.apply(this, arguments);
+      }
+    };
+  }
+
+
+  function map(iterator) {
+    if (this == null) throw new TypeError();
+    iterator = iterator || Prototype.K;
+
+    var object = Object(this);
+    var results = [], context = arguments[1], n = 0;
+
+    for (var i = 0, length = object.length >>> 0; i < length; i++) {
+      if (i in object) {
+        results[n] = iterator.call(context, object[i], i, object);
+      }
+      n++;
+    }
+    results.length = n;
+    return results;
+  }
+
+  if (arrayProto.map) {
+    map = wrapNative(Array.prototype.map);
+  }
+
+  function filter(iterator) {
+    if (this == null || !Object.isFunction(iterator))
+      throw new TypeError();
+
+    var object = Object(this);
+    var results = [], context = arguments[1], value;
+
+    for (var i = 0, length = object.length >>> 0; i < length; i++) {
+      if (i in object) {
+        value = object[i];
+        if (iterator.call(context, value, i, object)) {
+          results.push(value);
+        }
+      }
+    }
+    return results;
+  }
+
+  if (arrayProto.filter) {
+    filter = Array.prototype.filter;
+  }
+
+  function some(iterator) {
+    if (this == null) throw new TypeError();
+    iterator = iterator || Prototype.K;
+    var context = arguments[1];
+
+    var object = Object(this);
+    for (var i = 0, length = object.length >>> 0; i < length; i++) {
+      if (i in object && iterator.call(context, object[i], i, object)) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  if (arrayProto.some) {
+    some = wrapNative(Array.prototype.some);
+  }
+
+  function every(iterator) {
+    if (this == null) throw new TypeError();
+    iterator = iterator || Prototype.K;
+    var context = arguments[1];
+
+    var object = Object(this);
+    for (var i = 0, length = object.length >>> 0; i < length; i++) {
+      if (i in object && !iterator.call(context, object[i], i, object)) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+  if (arrayProto.every) {
+    every = wrapNative(Array.prototype.every);
+  }
+
+
   Object.extend(arrayProto, Enumerable);
 
+  if (arrayProto.entries === Enumerable.entries) {
+    delete arrayProto.entries;
+  }
+
   if (!arrayProto._reverse)
     arrayProto._reverse = arrayProto.reverse;
 
   Object.extend(arrayProto, {
     _each:     _each,
+
+    map:       map,
+    collect:   map,
+    select:    filter,
+    filter:    filter,
+    findAll:   filter,
+    some:      some,
+    any:       some,
+    every:     every,
+    all:       every,
+
     clear:     clear,
     first:     first,
     last:      last,
@@ -1214,7 +1396,7 @@ Array.from = $A;
 
   var CONCAT_ARGUMENTS_BUGGY = (function() {
     return [].concat(arguments)[0][0] !== 1;
-  })(1,2)
+  })(1,2);
 
   if (CONCAT_ARGUMENTS_BUGGY) arrayProto.concat = concat;
 
@@ -1231,12 +1413,14 @@ var Hash = Class.create(Enumerable, (function() {
   }
 
 
-  function _each(iterator) {
+  function _each(iterator, context) {
+    var i = 0;
     for (var key in this._object) {
       var value = this._object[key], pair = [key, value];
       pair.key = key;
       pair.value = value;
-      iterator(pair);
+      iterator.call(context, pair, i);
+      i++;
     }
   }
 
@@ -1289,7 +1473,13 @@ var Hash = Class.create(Enumerable, (function() {
 
   function toQueryPair(key, value) {
     if (Object.isUndefined(value)) return key;
-    return key + '=' + encodeURIComponent(String.interpret(value));
+
+    value = String.interpret(value);
+
+    value = value.gsub(/(\r)?\n/, '\r\n');
+    value = encodeURIComponent(value);
+    value = value.gsub(/%20/, '+');
+    return key + '=' + value;
   }
 
   function toQueryString() {
@@ -1399,10 +1589,10 @@ var ObjectRange = Class.create(Enumerable, (function() {
     this.exclusive = exclusive;
   }
 
-  function _each(iterator) {
-    var value = this.start;
-    while (this.include(value)) {
-      iterator(value);
+  function _each(iterator, context) {
+    var value = this.start, i;
+    for (i = 0; this.include(value); i++) {
+      iterator.call(context, value, i);
       value = value.succ();
     }
   }
@@ -1424,6 +1614,25 @@ var ObjectRange = Class.create(Enumerable, (function() {
 
 
 
+var Abstract = { };
+
+
+var Try = {
+  these: function() {
+    var returnValue;
+
+    for (var i = 0, length = arguments.length; i < length; i++) {
+      var lambda = arguments[i];
+      try {
+        returnValue = lambda();
+        break;
+      } catch (e) { }
+    }
+
+    return returnValue;
+  }
+};
+
 var Ajax = {
   getTransport: function() {
     return Try.these(
@@ -1439,8 +1648,8 @@ var Ajax = {
 Ajax.Responders = {
   responders: [],
 
-  _each: function(iterator) {
-    this.responders._each(iterator);
+  _each: function(iterator, context) {
+    this.responders._each(iterator, context);
   },
 
   register: function(responder) {
@@ -1578,7 +1787,8 @@ Ajax.Request = Class.create(Ajax.Base, {
     }
 
     for (var name in headers)
-      this.transport.setRequestHeader(name, headers[name]);
+      if (headers[name] != null)
+        this.transport.setRequestHeader(name, headers[name]);
   },
 
   success: function() {
@@ -1715,7 +1925,12 @@ Ajax.Response = Class.create({
   _getHeaderJSON: function() {
     var json = this.getHeader('X-JSON');
     if (!json) return null;
-    json = decodeURIComponent(escape(json));
+
+    try {
+      json = decodeURIComponent(escape(json));
+    } catch(e) {
+    }
+
     try {
       return json.evalJSON(this.request.options.sanitizeJSON ||
         !this.request.isSameOrigin());
@@ -1816,54 +2031,51 @@ Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
   }
 });
 
+(function(GLOBAL) {
 
-function $(element) {
-  if (arguments.length > 1) {
-    for (var i = 0, elements = [], length = arguments.length; i < length; i++)
-      elements.push($(arguments[i]));
-    return elements;
+  var UNDEFINED;
+  var SLICE = Array.prototype.slice;
+
+  var DIV = document.createElement('div');
+
+
+  function $(element) {
+    if (arguments.length > 1) {
+      for (var i = 0, elements = [], length = arguments.length; i < length; i++)
+        elements.push($(arguments[i]));
+      return elements;
+    }
+
+    if (Object.isString(element))
+      element = document.getElementById(element);
+    return Element.extend(element);
   }
-  if (Object.isString(element))
-    element = document.getElementById(element);
-  return Element.extend(element);
-}
 
-if (Prototype.BrowserFeatures.XPath) {
-  document._getElementsByXPath = function(expression, parentElement) {
-    var results = [];
-    var query = document.evaluate(expression, $(parentElement) || document,
-      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
-    for (var i = 0, length = query.snapshotLength; i < length; i++)
-      results.push(Element.extend(query.snapshotItem(i)));
-    return results;
-  };
-}
+  GLOBAL.$ = $;
 
-/*--------------------------------------------------------------------------*/
 
-if (!Node) var Node = { };
-
-if (!Node.ELEMENT_NODE) {
-  Object.extend(Node, {
-    ELEMENT_NODE: 1,
-    ATTRIBUTE_NODE: 2,
-    TEXT_NODE: 3,
-    CDATA_SECTION_NODE: 4,
-    ENTITY_REFERENCE_NODE: 5,
-    ENTITY_NODE: 6,
-    PROCESSING_INSTRUCTION_NODE: 7,
-    COMMENT_NODE: 8,
-    DOCUMENT_NODE: 9,
-    DOCUMENT_TYPE_NODE: 10,
-    DOCUMENT_FRAGMENT_NODE: 11,
-    NOTATION_NODE: 12
-  });
-}
+  if (!GLOBAL.Node) GLOBAL.Node = {};
 
+  if (!GLOBAL.Node.ELEMENT_NODE) {
+    Object.extend(GLOBAL.Node, {
+      ELEMENT_NODE:                1,
+      ATTRIBUTE_NODE:              2,
+      TEXT_NODE:                   3,
+      CDATA_SECTION_NODE:          4,
+      ENTITY_REFERENCE_NODE:       5,
+      ENTITY_NODE:                 6,
+      PROCESSING_INSTRUCTION_NODE: 7,
+      COMMENT_NODE:                8,
+      DOCUMENT_NODE:               9,
+      DOCUMENT_TYPE_NODE:         10,
+      DOCUMENT_FRAGMENT_NODE:     11,
+      NOTATION_NODE:              12
+    });
+  }
 
+  var ELEMENT_CACHE = {};
 
-(function(global) {
-  function shouldUseCache(tagName, attributes) {
+  function shouldUseCreationCache(tagName, attributes) {
     if (tagName === 'select') return false;
     if ('type' in attributes) return false;
     return true;
@@ -1879,12 +2091,11 @@ if (!Node.ELEMENT_NODE) {
     }
   })();
 
-  var element = global.Element;
 
-  global.Element = function(tagName, attributes) {
-    attributes = attributes || { };
+  var oldElement = GLOBAL.Element;
+  function Element(tagName, attributes) {
+    attributes = attributes || {};
     tagName = tagName.toLowerCase();
-    var cache = Element.cache;
 
     if (HAS_EXTENDED_CREATE_ELEMENT_SYNTAX && attributes.name) {
       tagName = '<' + tagName + ' name="' + attributes.name + '">';
@@ -1892,1015 +2103,1212 @@ if (!Node.ELEMENT_NODE) {
       return Element.writeAttribute(document.createElement(tagName), attributes);
     }
 
-    if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
+    if (!ELEMENT_CACHE[tagName])
+      ELEMENT_CACHE[tagName] = Element.extend(document.createElement(tagName));
 
-    var node = shouldUseCache(tagName, attributes) ?
-     cache[tagName].cloneNode(false) : document.createElement(tagName);
+    var node = shouldUseCreationCache(tagName, attributes) ?
+     ELEMENT_CACHE[tagName].cloneNode(false) : document.createElement(tagName);
 
     return Element.writeAttribute(node, attributes);
-  };
+  }
 
-  Object.extend(global.Element, element || { });
-  if (element) global.Element.prototype = element.prototype;
+  GLOBAL.Element = Element;
 
-})(this);
+  Object.extend(GLOBAL.Element, oldElement || {});
+  if (oldElement) GLOBAL.Element.prototype = oldElement.prototype;
+
+  Element.Methods = { ByTag: {}, Simulated: {} };
+
+  var methods = {};
+
+  var INSPECT_ATTRIBUTES = { id: 'id', className: 'class' };
+  function inspect(element) {
+    element = $(element);
+    var result = '<' + element.tagName.toLowerCase();
 
-Element.idCounter = 1;
-Element.cache = { };
+    var attribute, value;
+    for (var property in INSPECT_ATTRIBUTES) {
+      attribute = INSPECT_ATTRIBUTES[property];
+      value = (element[property] || '').toString();
+      if (value) result += ' ' + attribute + '=' + value.inspect(true);
+    }
 
-Element._purgeElement = function(element) {
-  var uid = element._prototypeUID;
-  if (uid) {
-    Element.stopObserving(element);
-    element._prototypeUID = void 0;
-    delete Element.Storage[uid];
+    return result + '>';
   }
-}
 
-Element.Methods = {
-  visible: function(element) {
-    return $(element).style.display != 'none';
-  },
+  methods.inspect = inspect;
 
-  toggle: function(element) {
+
+  function visible(element) {
+    return $(element).getStyle('display') !== 'none';
+  }
+
+  function toggle(element, bool) {
     element = $(element);
-    Element[Element.visible(element) ? 'hide' : 'show'](element);
+    if (typeof bool !== 'boolean')
+      bool = !Element.visible(element);
+    Element[bool ? 'show' : 'hide'](element);
+
     return element;
-  },
+  }
 
-  hide: function(element) {
+  function hide(element) {
     element = $(element);
     element.style.display = 'none';
     return element;
-  },
+  }
 
-  show: function(element) {
+  function show(element) {
     element = $(element);
     element.style.display = '';
     return element;
-  },
+  }
+
+
+  Object.extend(methods, {
+    visible: visible,
+    toggle:  toggle,
+    hide:    hide,
+    show:    show
+  });
+
 
-  remove: function(element) {
+  function remove(element) {
     element = $(element);
     element.parentNode.removeChild(element);
     return element;
-  },
+  }
 
-  update: (function(){
+  var SELECT_ELEMENT_INNERHTML_BUGGY = (function(){
+    var el = document.createElement("select"),
+        isBuggy = true;
+    el.innerHTML = "<option value=\"test\">test</option>";
+    if (el.options && el.options[0]) {
+      isBuggy = el.options[0].nodeName.toUpperCase() !== "OPTION";
+    }
+    el = null;
+    return isBuggy;
+  })();
 
-    var SELECT_ELEMENT_INNERHTML_BUGGY = (function(){
-      var el = document.createElement("select"),
-          isBuggy = true;
-      el.innerHTML = "<option value=\"test\">test</option>";
-      if (el.options && el.options[0]) {
-        isBuggy = el.options[0].nodeName.toUpperCase() !== "OPTION";
+  var TABLE_ELEMENT_INNERHTML_BUGGY = (function(){
+    try {
+      var el = document.createElement("table");
+      if (el && el.tBodies) {
+        el.innerHTML = "<tbody><tr><td>test</td></tr></tbody>";
+        var isBuggy = typeof el.tBodies[0] == "undefined";
+        el = null;
+        return isBuggy;
       }
+    } catch (e) {
+      return true;
+    }
+  })();
+
+  var LINK_ELEMENT_INNERHTML_BUGGY = (function() {
+    try {
+      var el = document.createElement('div');
+      el.innerHTML = "<link />";
+      var isBuggy = (el.childNodes.length === 0);
       el = null;
       return isBuggy;
-    })();
+    } catch(e) {
+      return true;
+    }
+  })();
 
-    var TABLE_ELEMENT_INNERHTML_BUGGY = (function(){
-      try {
-        var el = document.createElement("table");
-        if (el && el.tBodies) {
-          el.innerHTML = "<tbody><tr><td>test</td></tr></tbody>";
-          var isBuggy = typeof el.tBodies[0] == "undefined";
-          el = null;
-          return isBuggy;
-        }
-      } catch (e) {
-        return true;
-      }
-    })();
+  var ANY_INNERHTML_BUGGY = SELECT_ELEMENT_INNERHTML_BUGGY ||
+   TABLE_ELEMENT_INNERHTML_BUGGY || LINK_ELEMENT_INNERHTML_BUGGY;
 
-    var LINK_ELEMENT_INNERHTML_BUGGY = (function() {
-      try {
-        var el = document.createElement('div');
-        el.innerHTML = "<link>";
-        var isBuggy = (el.childNodes.length === 0);
-        el = null;
-        return isBuggy;
-      } catch(e) {
-        return true;
-      }
-    })();
+  var SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (function () {
+    var s = document.createElement("script"),
+        isBuggy = false;
+    try {
+      s.appendChild(document.createTextNode(""));
+      isBuggy = !s.firstChild ||
+        s.firstChild && s.firstChild.nodeType !== 3;
+    } catch (e) {
+      isBuggy = true;
+    }
+    s = null;
+    return isBuggy;
+  })();
 
-    var ANY_INNERHTML_BUGGY = SELECT_ELEMENT_INNERHTML_BUGGY ||
-     TABLE_ELEMENT_INNERHTML_BUGGY || LINK_ELEMENT_INNERHTML_BUGGY;
+  function update(element, content) {
+    element = $(element);
 
-    var SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (function () {
-      var s = document.createElement("script"),
-          isBuggy = false;
-      try {
-        s.appendChild(document.createTextNode(""));
-        isBuggy = !s.firstChild ||
-          s.firstChild && s.firstChild.nodeType !== 3;
-      } catch (e) {
-        isBuggy = true;
-      }
-      s = null;
-      return isBuggy;
-    })();
+    var descendants = element.getElementsByTagName('*'),
+     i = descendants.length;
+    while (i--) purgeElement(descendants[i]);
 
+    if (content && content.toElement)
+      content = content.toElement();
 
-    function update(element, content) {
-      element = $(element);
-      var purgeElement = Element._purgeElement;
+    if (Object.isElement(content))
+      return element.update().insert(content);
 
-      var descendants = element.getElementsByTagName('*'),
-       i = descendants.length;
-      while (i--) purgeElement(descendants[i]);
 
-      if (content && content.toElement)
-        content = content.toElement();
+    content = Object.toHTML(content);
+    var tagName = element.tagName.toUpperCase();
 
-      if (Object.isElement(content))
-        return element.update().insert(content);
+    if (tagName === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {
+      element.text = content;
+      return element;
+    }
 
-      content = Object.toHTML(content);
+    if (ANY_INNERHTML_BUGGY) {
+      if (tagName in INSERTION_TRANSLATIONS.tags) {
+        while (element.firstChild)
+          element.removeChild(element.firstChild);
 
-      var tagName = element.tagName.toUpperCase();
+        var nodes = getContentFromAnonymousElement(tagName, content.stripScripts());
+        for (var i = 0, node; node = nodes[i]; i++)
+          element.appendChild(node);
 
-      if (tagName === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {
-        element.text = content;
-        return element;
-      }
+      } else if (LINK_ELEMENT_INNERHTML_BUGGY && Object.isString(content) && content.indexOf('<link') > -1) {
+        while (element.firstChild)
+          element.removeChild(element.firstChild);
 
-      if (ANY_INNERHTML_BUGGY) {
-        if (tagName in Element._insertionTranslations.tags) {
-          while (element.firstChild) {
-            element.removeChild(element.firstChild);
-          }
-          Element._getContentFromAnonymousElement(tagName, content.stripScripts())
-            .each(function(node) {
-              element.appendChild(node)
-            });
-        } else if (LINK_ELEMENT_INNERHTML_BUGGY && Object.isString(content) && content.indexOf('<link') > -1) {
-          while (element.firstChild) {
-            element.removeChild(element.firstChild);
-          }
-          var nodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts(), true);
-          nodes.each(function(node) { element.appendChild(node) });
-        }
-        else {
-          element.innerHTML = content.stripScripts();
-        }
-      }
-      else {
+        var nodes = getContentFromAnonymousElement(tagName,
+         content.stripScripts(), true);
+
+        for (var i = 0, node; node = nodes[i]; i++)
+          element.appendChild(node);
+      } else {
         element.innerHTML = content.stripScripts();
       }
-
-      content.evalScripts.bind(content).defer();
-      return element;
+    } else {
+      element.innerHTML = content.stripScripts();
     }
 
-    return update;
-  })(),
+    content.evalScripts.bind(content).defer();
+    return element;
+  }
 
-  replace: function(element, content) {
+  function replace(element, content) {
     element = $(element);
-    if (content && content.toElement) content = content.toElement();
-    else if (!Object.isElement(content)) {
+
+    if (content && content.toElement) {
+      content = content.toElement();
+    } else if (!Object.isElement(content)) {
       content = Object.toHTML(content);
       var range = element.ownerDocument.createRange();
       range.selectNode(element);
       content.evalScripts.bind(content).defer();
       content = range.createContextualFragment(content.stripScripts());
     }
+
     element.parentNode.replaceChild(content, element);
     return element;
-  },
+  }
 
-  insert: function(element, insertions) {
+  var INSERTION_TRANSLATIONS = {
+    before: function(element, node) {
+      element.parentNode.insertBefore(node, element);
+    },
+    top: function(element, node) {
+      element.insertBefore(node, element.firstChild);
+    },
+    bottom: function(element, node) {
+      element.appendChild(node);
+    },
+    after: function(element, node) {
+      element.parentNode.insertBefore(node, element.nextSibling);
+    },
+
+    tags: {
+      TABLE:  ['<table>',                '</table>',                   1],
+      TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
+      TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
+      TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
+      SELECT: ['<select>',               '</select>',                  1]
+    }
+  };
+
+  var tags = INSERTION_TRANSLATIONS.tags;
+
+  Object.extend(tags, {
+    THEAD: tags.TBODY,
+    TFOOT: tags.TBODY,
+    TH:    tags.TD
+  });
+
+  function replace_IE(element, content) {
     element = $(element);
+    if (content && content.toElement)
+      content = content.toElement();
+    if (Object.isElement(content)) {
+      element.parentNode.replaceChild(content, element);
+      return element;
+    }
 
-    if (Object.isString(insertions) || Object.isNumber(insertions) ||
-        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
-          insertions = {bottom:insertions};
+    content = Object.toHTML(content);
+    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
 
-    var content, insert, tagName, childNodes;
+    if (tagName in INSERTION_TRANSLATIONS.tags) {
+      var nextSibling = Element.next(element);
+      var fragments = getContentFromAnonymousElement(
+       tagName, content.stripScripts());
 
-    for (var position in insertions) {
-      content  = insertions[position];
-      position = position.toLowerCase();
-      insert = Element._insertionTranslations[position];
+      parent.removeChild(element);
 
-      if (content && content.toElement) content = content.toElement();
-      if (Object.isElement(content)) {
-        insert(element, content);
-        continue;
-      }
+      var iterator;
+      if (nextSibling)
+        iterator = function(node) { parent.insertBefore(node, nextSibling) };
+      else
+        iterator = function(node) { parent.appendChild(node); }
 
-      content = Object.toHTML(content);
+      fragments.each(iterator);
+    } else {
+      element.outerHTML = content.stripScripts();
+    }
 
-      tagName = ((position == 'before' || position == 'after')
-        ? element.parentNode : element).tagName.toUpperCase();
+    content.evalScripts.bind(content).defer();
+    return element;
+  }
 
-      childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
+  if ('outerHTML' in document.documentElement)
+    replace = replace_IE;
 
-      if (position == 'top' || position == 'after') childNodes.reverse();
-      childNodes.each(insert.curry(element));
+  function isContent(content) {
+    if (Object.isUndefined(content) || content === null) return false;
 
-      content.evalScripts.bind(content).defer();
+    if (Object.isString(content) || Object.isNumber(content)) return true;
+    if (Object.isElement(content)) return true;
+    if (content.toElement || content.toHTML) return true;
+
+    return false;
+  }
+
+  function insertContentAt(element, content, position) {
+    position   = position.toLowerCase();
+    var method = INSERTION_TRANSLATIONS[position];
+
+    if (content && content.toElement) content = content.toElement();
+    if (Object.isElement(content)) {
+      method(element, content);
+      return element;
     }
 
+    content = Object.toHTML(content);
+    var tagName = ((position === 'before' || position === 'after') ?
+     element.parentNode : element).tagName.toUpperCase();
+
+    var childNodes = getContentFromAnonymousElement(tagName, content.stripScripts());
+
+    if (position === 'top' || position === 'after') childNodes.reverse();
+
+    for (var i = 0, node; node = childNodes[i]; i++)
+      method(element, node);
+
+    content.evalScripts.bind(content).defer();
+  }
+
+  function insert(element, insertions) {
+    element = $(element);
+
+    if (isContent(insertions))
+      insertions = { bottom: insertions };
+
+    for (var position in insertions)
+      insertContentAt(element, insertions[position], position);
+
     return element;
-  },
+  }
 
-  wrap: function(element, wrapper, attributes) {
+  function wrap(element, wrapper, attributes) {
     element = $(element);
-    if (Object.isElement(wrapper))
-      $(wrapper).writeAttribute(attributes || { });
-    else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
-    else wrapper = new Element('div', wrapper);
+
+    if (Object.isElement(wrapper)) {
+      $(wrapper).writeAttribute(attributes || {});
+    } else if (Object.isString(wrapper)) {
+      wrapper = new Element(wrapper, attributes);
+    } else {
+      wrapper = new Element('div', wrapper);
+    }
+
     if (element.parentNode)
       element.parentNode.replaceChild(wrapper, element);
+
     wrapper.appendChild(element);
+
     return wrapper;
-  },
+  }
 
-  inspect: function(element) {
+  function cleanWhitespace(element) {
     element = $(element);
-    var result = '<' + element.tagName.toLowerCase();
-    $H({'id': 'id', 'className': 'class'}).each(function(pair) {
-      var property = pair.first(),
-          attribute = pair.last(),
-          value = (element[property] || '').toString();
-      if (value) result += ' ' + attribute + '=' + value.inspect(true);
-    });
-    return result + '>';
-  },
+    var node = element.firstChild;
+
+    while (node) {
+      var nextNode = node.nextSibling;
+      if (node.nodeType === Node.TEXT_NODE && !/\S/.test(node.nodeValue))
+        element.removeChild(node);
+      node = nextNode;
+    }
+    return element;
+  }
+
+  function empty(element) {
+    return $(element).innerHTML.blank();
+  }
+
+  function getContentFromAnonymousElement(tagName, html, force) {
+    var t = INSERTION_TRANSLATIONS.tags[tagName], div = DIV;
+
+    var workaround = !!t;
+    if (!workaround && force) {
+      workaround = true;
+      t = ['', '', 0];
+    }
+
+    if (workaround) {
+      div.innerHTML = '&#160;' + t[0] + html + t[1];
+      div.removeChild(div.firstChild);
+      for (var i = t[2]; i--; )
+        div = div.firstChild;
+    } else {
+      div.innerHTML = html;
+    }
+
+    return $A(div.childNodes);
+  }
+
+  function clone(element, deep) {
+    if (!(element = $(element))) return;
+    var clone = element.cloneNode(deep);
+    if (!HAS_UNIQUE_ID_PROPERTY) {
+      clone._prototypeUID = UNDEFINED;
+      if (deep) {
+        var descendants = Element.select(clone, '*'),
+         i = descendants.length;
+        while (i--)
+          descendants[i]._prototypeUID = UNDEFINED;
+      }
+    }
+    return Element.extend(clone);
+  }
+
+  function purgeElement(element) {
+    var uid = getUniqueElementID(element);
+    if (uid) {
+      Element.stopObserving(element);
+      if (!HAS_UNIQUE_ID_PROPERTY)
+        element._prototypeUID = UNDEFINED;
+      delete Element.Storage[uid];
+    }
+  }
+
+  function purgeCollection(elements) {
+    var i = elements.length;
+    while (i--)
+      purgeElement(elements[i]);
+  }
 
-  recursivelyCollect: function(element, property, maximumLength) {
+  function purgeCollection_IE(elements) {
+    var i = elements.length, element, uid;
+    while (i--) {
+      element = elements[i];
+      uid = getUniqueElementID(element);
+      delete Element.Storage[uid];
+      delete Event.cache[uid];
+    }
+  }
+
+  if (HAS_UNIQUE_ID_PROPERTY) {
+    purgeCollection = purgeCollection_IE;
+  }
+
+
+  function purge(element) {
+    if (!(element = $(element))) return;
+    purgeElement(element);
+
+    var descendants = element.getElementsByTagName('*'),
+     i = descendants.length;
+
+    while (i--) purgeElement(descendants[i]);
+
+    return null;
+  }
+
+  Object.extend(methods, {
+    remove:  remove,
+    update:  update,
+    replace: replace,
+    insert:  insert,
+    wrap:    wrap,
+    cleanWhitespace: cleanWhitespace,
+    empty:   empty,
+    clone:   clone,
+    purge:   purge
+  });
+
+
+
+  function recursivelyCollect(element, property, maximumLength) {
     element = $(element);
     maximumLength = maximumLength || -1;
     var elements = [];
 
     while (element = element[property]) {
-      if (element.nodeType == 1)
+      if (element.nodeType === Node.ELEMENT_NODE)
         elements.push(Element.extend(element));
-      if (elements.length == maximumLength)
-        break;
+
+      if (elements.length === maximumLength) break;
     }
 
     return elements;
-  },
+  }
 
-  ancestors: function(element) {
-    return Element.recursivelyCollect(element, 'parentNode');
-  },
 
-  descendants: function(element) {
-    return Element.select(element, "*");
-  },
+  function ancestors(element) {
+    return recursivelyCollect(element, 'parentNode');
+  }
+
+  function descendants(element) {
+    return Element.select(element, '*');
+  }
 
-  firstDescendant: function(element) {
+  function firstDescendant(element) {
     element = $(element).firstChild;
-    while (element && element.nodeType != 1) element = element.nextSibling;
+    while (element && element.nodeType !== Node.ELEMENT_NODE)
+      element = element.nextSibling;
+
     return $(element);
-  },
+  }
 
-  immediateDescendants: function(element) {
+  function immediateDescendants(element) {
     var results = [], child = $(element).firstChild;
+
     while (child) {
-      if (child.nodeType === 1) {
+      if (child.nodeType === Node.ELEMENT_NODE)
         results.push(Element.extend(child));
-      }
+
       child = child.nextSibling;
     }
+
     return results;
-  },
+  }
 
-  previousSiblings: function(element, maximumLength) {
-    return Element.recursivelyCollect(element, 'previousSibling');
-  },
+  function previousSiblings(element) {
+    return recursivelyCollect(element, 'previousSibling');
+  }
 
-  nextSiblings: function(element) {
-    return Element.recursivelyCollect(element, 'nextSibling');
-  },
+  function nextSiblings(element) {
+    return recursivelyCollect(element, 'nextSibling');
+  }
 
-  siblings: function(element) {
+  function siblings(element) {
     element = $(element);
-    return Element.previousSiblings(element).reverse()
-      .concat(Element.nextSiblings(element));
-  },
+    var previous = previousSiblings(element),
+     next = nextSiblings(element);
+    return previous.reverse().concat(next);
+  }
 
-  match: function(element, selector) {
+  function match(element, selector) {
     element = $(element);
+
     if (Object.isString(selector))
       return Prototype.Selector.match(element, selector);
+
     return selector.match(element);
-  },
+  }
 
-  up: function(element, expression, index) {
-    element = $(element);
-    if (arguments.length == 1) return $(element.parentNode);
-    var ancestors = Element.ancestors(element);
-    return Object.isNumber(expression) ? ancestors[expression] :
-      Prototype.Selector.find(ancestors, expression, index);
-  },
 
-  down: function(element, expression, index) {
-    element = $(element);
-    if (arguments.length == 1) return Element.firstDescendant(element);
-    return Object.isNumber(expression) ? Element.descendants(element)[expression] :
-      Element.select(element, expression)[index || 0];
-  },
+  function _recursivelyFind(element, property, expression, index) {
+    element = $(element), expression = expression || 0, index = index || 0;
+    if (Object.isNumber(expression)) {
+      index = expression, expression = null;
+    }
 
-  previous: function(element, expression, index) {
-    element = $(element);
-    if (Object.isNumber(expression)) index = expression, expression = false;
-    if (!Object.isNumber(index)) index = 0;
+    while (element = element[property]) {
+      if (element.nodeType !== 1) continue;
+      if (expression && !Prototype.Selector.match(element, expression))
+        continue;
+      if (--index >= 0) continue;
 
-    if (expression) {
-      return Prototype.Selector.find(element.previousSiblings(), expression, index);
-    } else {
-      return element.recursivelyCollect("previousSibling", index + 1)[index];
+      return Element.extend(element);
     }
-  },
+  }
 
-  next: function(element, expression, index) {
+
+  function up(element, expression, index) {
     element = $(element);
-    if (Object.isNumber(expression)) index = expression, expression = false;
-    if (!Object.isNumber(index)) index = 0;
 
-    if (expression) {
-      return Prototype.Selector.find(element.nextSiblings(), expression, index);
-    } else {
-      var maximumLength = Object.isNumber(index) ? index + 1 : 1;
-      return element.recursivelyCollect("nextSibling", index + 1)[index];
-    }
-  },
+    if (arguments.length === 1) return $(element.parentNode);
+    return _recursivelyFind(element, 'parentNode', expression, index);
+  }
 
+  function down(element, expression, index) {
+    if (arguments.length === 1) return firstDescendant(element);
+    element = $(element), expression = expression || 0, index = index || 0;
 
-  select: function(element) {
+    if (Object.isNumber(expression))
+      index = expression, expression = '*';
+
+    var node = Prototype.Selector.select(expression, element)[index];
+    return Element.extend(node);
+  }
+
+  function previous(element, expression, index) {
+    return _recursivelyFind(element, 'previousSibling', expression, index);
+  }
+
+  function next(element, expression, index) {
+    return _recursivelyFind(element, 'nextSibling', expression, index);
+  }
+
+  function select(element) {
     element = $(element);
-    var expressions = Array.prototype.slice.call(arguments, 1).join(', ');
+    var expressions = SLICE.call(arguments, 1).join(', ');
     return Prototype.Selector.select(expressions, element);
-  },
+  }
 
-  adjacent: function(element) {
+  function adjacent(element) {
     element = $(element);
-    var expressions = Array.prototype.slice.call(arguments, 1).join(', ');
-    return Prototype.Selector.select(expressions, element.parentNode).without(element);
-  },
+    var expressions = SLICE.call(arguments, 1).join(', ');
+    var siblings = Element.siblings(element), results = [];
+    for (var i = 0, sibling; sibling = siblings[i]; i++) {
+      if (Prototype.Selector.match(sibling, expressions))
+        results.push(sibling);
+    }
 
-  identify: function(element) {
+    return results;
+  }
+
+  function descendantOf_DOM(element, ancestor) {
+    element = $(element), ancestor = $(ancestor);
+    if (!element || !ancestor) return false;
+    while (element = element.parentNode)
+      if (element === ancestor) return true;
+    return false;
+  }
+
+  function descendantOf_contains(element, ancestor) {
+    element = $(element), ancestor = $(ancestor);
+    if (!element || !ancestor) return false;
+    if (!ancestor.contains) return descendantOf_DOM(element, ancestor);
+    return ancestor.contains(element) && ancestor !== element;
+  }
+
+  function descendantOf_compareDocumentPosition(element, ancestor) {
+    element = $(element), ancestor = $(ancestor);
+    if (!element || !ancestor) return false;
+    return (element.compareDocumentPosition(ancestor) & 8) === 8;
+  }
+
+  var descendantOf;
+  if (DIV.compareDocumentPosition) {
+    descendantOf = descendantOf_compareDocumentPosition;
+  } else if (DIV.contains) {
+    descendantOf = descendantOf_contains;
+  } else {
+    descendantOf = descendantOf_DOM;
+  }
+
+
+  Object.extend(methods, {
+    recursivelyCollect:   recursivelyCollect,
+    ancestors:            ancestors,
+    descendants:          descendants,
+    firstDescendant:      firstDescendant,
+    immediateDescendants: immediateDescendants,
+    previousSiblings:     previousSiblings,
+    nextSiblings:         nextSiblings,
+    siblings:             siblings,
+    match:                match,
+    up:                   up,
+    down:                 down,
+    previous:             previous,
+    next:                 next,
+    select:               select,
+    adjacent:             adjacent,
+    descendantOf:         descendantOf,
+
+    getElementsBySelector: select,
+
+    childElements:         immediateDescendants
+  });
+
+
+  var idCounter = 1;
+  function identify(element) {
     element = $(element);
     var id = Element.readAttribute(element, 'id');
     if (id) return id;
-    do { id = 'anonymous_element_' + Element.idCounter++ } while ($(id));
+
+    do { id = 'anonymous_element_' + idCounter++ } while ($(id));
+
     Element.writeAttribute(element, 'id', id);
     return id;
-  },
+  }
+
+
+  function readAttribute(element, name) {
+    return $(element).getAttribute(name);
+  }
 
-  readAttribute: function(element, name) {
+  function readAttribute_IE(element, name) {
     element = $(element);
-    if (Prototype.Browser.IE) {
-      var t = Element._attributeTranslations.read;
-      if (t.values[name]) return t.values[name](element, name);
-      if (t.names[name]) name = t.names[name];
-      if (name.include(':')) {
-        return (!element.attributes || !element.attributes[name]) ? null :
-         element.attributes[name].value;
-      }
+
+    var table = ATTRIBUTE_TRANSLATIONS.read;
+    if (table.values[name])
+      return table.values[name](element, name);
+
+    if (table.names[name]) name = table.names[name];
+
+    if (name.include(':')) {
+      if (!element.attributes || !element.attributes[name]) return null;
+      return element.attributes[name].value;
     }
+
     return element.getAttribute(name);
-  },
+  }
+
+  function readAttribute_Opera(element, name) {
+    if (name === 'title') return element.title;
+    return element.getAttribute(name);
+  }
+
+  var PROBLEMATIC_ATTRIBUTE_READING = (function() {
+    DIV.setAttribute('onclick', []);
+    var value = DIV.getAttribute('onclick');
+    var isFunction = Object.isArray(value);
+    DIV.removeAttribute('onclick');
+    return isFunction;
+  })();
 
-  writeAttribute: function(element, name, value) {
+  if (PROBLEMATIC_ATTRIBUTE_READING) {
+    readAttribute = readAttribute_IE;
+  } else if (Prototype.Browser.Opera) {
+    readAttribute = readAttribute_Opera;
+  }
+
+
+  function writeAttribute(element, name, value) {
     element = $(element);
-    var attributes = { }, t = Element._attributeTranslations.write;
+    var attributes = {}, table = ATTRIBUTE_TRANSLATIONS.write;
 
-    if (typeof name == 'object') attributes = name;
-    else attributes[name] = Object.isUndefined(value) ? true : value;
+    if (typeof name === 'object') {
+      attributes = name;
+    } else {
+      attributes[name] = Object.isUndefined(value) ? true : value;
+    }
 
     for (var attr in attributes) {
-      name = t.names[attr] || attr;
+      name = table.names[attr] || attr;
       value = attributes[attr];
-      if (t.values[attr]) name = t.values[attr](element, value);
+      if (table.values[attr]) {
+        value = table.values[attr](element, value);
+        if (Object.isUndefined(value)) continue;
+      }
       if (value === false || value === null)
         element.removeAttribute(name);
       else if (value === true)
         element.setAttribute(name, name);
       else element.setAttribute(name, value);
     }
+
     return element;
-  },
+  }
 
-  getHeight: function(element) {
-    return Element.getDimensions(element).height;
-  },
+  var PROBLEMATIC_HAS_ATTRIBUTE_WITH_CHECKBOXES = (function () {
+    if (!HAS_EXTENDED_CREATE_ELEMENT_SYNTAX) {
+      return false;
+    }
+    var checkbox = document.createElement('<input type="checkbox">');
+    checkbox.checked = true;
+    var node = checkbox.getAttributeNode('checked');
+    return !node || !node.specified;
+  })();
 
-  getWidth: function(element) {
-    return Element.getDimensions(element).width;
-  },
+  function hasAttribute(element, attribute) {
+    attribute = ATTRIBUTE_TRANSLATIONS.has[attribute] || attribute;
+    var node = $(element).getAttributeNode(attribute);
+    return !!(node && node.specified);
+  }
 
-  classNames: function(element) {
+  function hasAttribute_IE(element, attribute) {
+    if (attribute === 'checked') {
+      return element.checked;
+    }
+    return hasAttribute(element, attribute);
+  }
+
+  GLOBAL.Element.Methods.Simulated.hasAttribute =
+   PROBLEMATIC_HAS_ATTRIBUTE_WITH_CHECKBOXES ?
+   hasAttribute_IE : hasAttribute;
+
+  function classNames(element) {
     return new Element.ClassNames(element);
-  },
+  }
+
+  var regExpCache = {};
+  function getRegExpForClassName(className) {
+    if (regExpCache[className]) return regExpCache[className];
+
+    var re = new RegExp("(^|\\s+)" + className + "(\\s+|$)");
+    regExpCache[className] = re;
+    return re;
+  }
 
-  hasClassName: function(element, className) {
+  function hasClassName(element, className) {
     if (!(element = $(element))) return;
+
     var elementClassName = element.className;
-    return (elementClassName.length > 0 && (elementClassName == className ||
-      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
-  },
 
-  addClassName: function(element, className) {
+    if (elementClassName.length === 0) return false;
+    if (elementClassName === className) return true;
+
+    return getRegExpForClassName(className).test(elementClassName);
+  }
+
+  function addClassName(element, className) {
     if (!(element = $(element))) return;
-    if (!Element.hasClassName(element, className))
+
+    if (!hasClassName(element, className))
       element.className += (element.className ? ' ' : '') + className;
+
     return element;
-  },
+  }
 
-  removeClassName: function(element, className) {
+  function removeClassName(element, className) {
     if (!(element = $(element))) return;
+
     element.className = element.className.replace(
-      new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
+     getRegExpForClassName(className), ' ').strip();
+
     return element;
-  },
+  }
 
-  toggleClassName: function(element, className) {
+  function toggleClassName(element, className, bool) {
     if (!(element = $(element))) return;
-    return Element[Element.hasClassName(element, className) ?
-      'removeClassName' : 'addClassName'](element, className);
-  },
 
-  cleanWhitespace: function(element) {
-    element = $(element);
-    var node = element.firstChild;
-    while (node) {
-      var nextNode = node.nextSibling;
-      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
-        element.removeChild(node);
-      node = nextNode;
-    }
-    return element;
-  },
+    if (Object.isUndefined(bool))
+      bool = !hasClassName(element, className);
 
-  empty: function(element) {
-    return $(element).innerHTML.blank();
-  },
+    var method = Element[bool ? 'addClassName' : 'removeClassName'];
+    return method(element, className);
+  }
 
-  descendantOf: function(element, ancestor) {
-    element = $(element), ancestor = $(ancestor);
+  var ATTRIBUTE_TRANSLATIONS = {};
 
-    if (element.compareDocumentPosition)
-      return (element.compareDocumentPosition(ancestor) & 8) === 8;
+  var classProp = 'className', forProp = 'for';
 
-    if (ancestor.contains)
-      return ancestor.contains(element) && ancestor !== element;
+  DIV.setAttribute(classProp, 'x');
+  if (DIV.className !== 'x') {
+    DIV.setAttribute('class', 'x');
+    if (DIV.className === 'x')
+      classProp = 'class';
+  }
 
-    while (element = element.parentNode)
-      if (element == ancestor) return true;
+  var LABEL = document.createElement('label');
+  LABEL.setAttribute(forProp, 'x');
+  if (LABEL.htmlFor !== 'x') {
+    LABEL.setAttribute('htmlFor', 'x');
+    if (LABEL.htmlFor === 'x')
+      forProp = 'htmlFor';
+  }
+  LABEL = null;
 
-    return false;
-  },
+  function _getAttr(element, attribute) {
+    return element.getAttribute(attribute);
+  }
 
-  scrollTo: function(element) {
-    element = $(element);
-    var pos = Element.cumulativeOffset(element);
-    window.scrollTo(pos[0], pos[1]);
-    return element;
-  },
+  function _getAttr2(element, attribute) {
+    return element.getAttribute(attribute, 2);
+  }
 
-  getStyle: function(element, style) {
-    element = $(element);
-    style = style == 'float' ? 'cssFloat' : style.camelize();
-    var value = element.style[style];
-    if (!value || value == 'auto') {
-      var css = document.defaultView.getComputedStyle(element, null);
-      value = css ? css[style] : null;
-    }
-    if (style == 'opacity') return value ? parseFloat(value) : 1.0;
-    return value == 'auto' ? null : value;
-  },
+  function _getAttrNode(element, attribute) {
+    var node = element.getAttributeNode(attribute);
+    return node ? node.value : '';
+  }
 
-  getOpacity: function(element) {
-    return $(element).getStyle('opacity');
-  },
+  function _getFlag(element, attribute) {
+    return $(element).hasAttribute(attribute) ? attribute : null;
+  }
 
-  setStyle: function(element, styles) {
-    element = $(element);
-    var elementStyle = element.style, match;
-    if (Object.isString(styles)) {
-      element.style.cssText += ';' + styles;
-      return styles.include('opacity') ?
-        element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
-    }
-    for (var property in styles)
-      if (property == 'opacity') element.setOpacity(styles[property]);
-      else
-        elementStyle[(property == 'float' || property == 'cssFloat') ?
-          (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
-            property] = styles[property];
+  DIV.onclick = Prototype.emptyFunction;
+  var onclickValue = DIV.getAttribute('onclick');
 
-    return element;
-  },
+  var _getEv;
 
-  setOpacity: function(element, value) {
-    element = $(element);
-    element.style.opacity = (value == 1 || value === '') ? '' :
-      (value < 0.00001) ? 0 : value;
-    return element;
-  },
+  if (String(onclickValue).indexOf('{') > -1) {
+    _getEv = function(element, attribute) {
+      var value = element.getAttribute(attribute);
+      if (!value) return null;
+      value = value.toString();
+      value = value.split('{')[1];
+      value = value.split('}')[0];
+      return value.strip();
+    };
+  }
+  else if (onclickValue === '') {
+    _getEv = function(element, attribute) {
+      var value = element.getAttribute(attribute);
+      if (!value) return null;
+      return value.strip();
+    };
+  }
 
-  makePositioned: function(element) {
-    element = $(element);
-    var pos = Element.getStyle(element, 'position');
-    if (pos == 'static' || !pos) {
-      element._madePositioned = true;
-      element.style.position = 'relative';
-      if (Prototype.Browser.Opera) {
-        element.style.top = 0;
-        element.style.left = 0;
+  ATTRIBUTE_TRANSLATIONS.read = {
+    names: {
+      'class':     classProp,
+      'className': classProp,
+      'for':       forProp,
+      'htmlFor':   forProp
+    },
+
+    values: {
+      style: function(element) {
+        return element.style.cssText.toLowerCase();
+      },
+      title: function(element) {
+        return element.title;
       }
     }
-    return element;
-  },
+  };
 
-  undoPositioned: function(element) {
-    element = $(element);
-    if (element._madePositioned) {
-      element._madePositioned = undefined;
-      element.style.position =
-        element.style.top =
-        element.style.left =
-        element.style.bottom =
-        element.style.right = '';
+  ATTRIBUTE_TRANSLATIONS.write = {
+    names: {
+      className:   'class',
+      htmlFor:     'for',
+      cellpadding: 'cellPadding',
+      cellspacing: 'cellSpacing'
+    },
+
+    values: {
+      checked: function(element, value) {
+        value = !!value;
+        element.checked = value;
+        return value ? 'checked' : null;
+      },
+
+      style: function(element, value) {
+        element.style.cssText = value ? value : '';
+      }
     }
-    return element;
-  },
+  };
 
-  makeClipping: function(element) {
-    element = $(element);
-    if (element._overflow) return element;
-    element._overflow = Element.getStyle(element, 'overflow') || 'auto';
-    if (element._overflow !== 'hidden')
-      element.style.overflow = 'hidden';
-    return element;
-  },
+  ATTRIBUTE_TRANSLATIONS.has = { names: {} };
+
+  Object.extend(ATTRIBUTE_TRANSLATIONS.write.names,
+   ATTRIBUTE_TRANSLATIONS.read.names);
+
+  var CAMEL_CASED_ATTRIBUTE_NAMES = $w('colSpan rowSpan vAlign dateTime ' +
+   'accessKey tabIndex encType maxLength readOnly longDesc frameBorder');
+
+  for (var i = 0, attr; attr = CAMEL_CASED_ATTRIBUTE_NAMES[i]; i++) {
+    ATTRIBUTE_TRANSLATIONS.write.names[attr.toLowerCase()] = attr;
+    ATTRIBUTE_TRANSLATIONS.has.names[attr.toLowerCase()]   = attr;
+  }
+
+  Object.extend(ATTRIBUTE_TRANSLATIONS.read.values, {
+    href:        _getAttr2,
+    src:         _getAttr2,
+    type:        _getAttr,
+    action:      _getAttrNode,
+    disabled:    _getFlag,
+    checked:     _getFlag,
+    readonly:    _getFlag,
+    multiple:    _getFlag,
+    onload:      _getEv,
+    onunload:    _getEv,
+    onclick:     _getEv,
+    ondblclick:  _getEv,
+    onmousedown: _getEv,
+    onmouseup:   _getEv,
+    onmouseover: _getEv,
+    onmousemove: _getEv,
+    onmouseout:  _getEv,
+    onfocus:     _getEv,
+    onblur:      _getEv,
+    onkeypress:  _getEv,
+    onkeydown:   _getEv,
+    onkeyup:     _getEv,
+    onsubmit:    _getEv,
+    onreset:     _getEv,
+    onselect:    _getEv,
+    onchange:    _getEv
+  });
 
-  undoClipping: function(element) {
-    element = $(element);
-    if (!element._overflow) return element;
-    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
-    element._overflow = null;
-    return element;
-  },
 
-  clonePosition: function(element, source) {
-    var options = Object.extend({
-      setLeft:    true,
-      setTop:     true,
-      setWidth:   true,
-      setHeight:  true,
-      offsetTop:  0,
-      offsetLeft: 0
-    }, arguments[2] || { });
+  Object.extend(methods, {
+    identify:        identify,
+    readAttribute:   readAttribute,
+    writeAttribute:  writeAttribute,
+    classNames:      classNames,
+    hasClassName:    hasClassName,
+    addClassName:    addClassName,
+    removeClassName: removeClassName,
+    toggleClassName: toggleClassName
+  });
+
+
+  function normalizeStyleName(style) {
+    if (style === 'float' || style === 'styleFloat')
+      return 'cssFloat';
+    return style.camelize();
+  }
 
-    source = $(source);
-    var p = Element.viewportOffset(source), delta = [0, 0], parent = null;
+  function normalizeStyleName_IE(style) {
+    if (style === 'float' || style === 'cssFloat')
+      return 'styleFloat';
+    return style.camelize();
+  }
 
+  function setStyle(element, styles) {
     element = $(element);
+    var elementStyle = element.style, match;
 
-    if (Element.getStyle(element, 'position') == 'absolute') {
-      parent = Element.getOffsetParent(element);
-      delta = Element.viewportOffset(parent);
+    if (Object.isString(styles)) {
+      elementStyle.cssText += ';' + styles;
+      if (styles.include('opacity')) {
+        var opacity = styles.match(/opacity:\s*(\d?\.?\d*)/)[1];
+        Element.setOpacity(element, opacity);
+      }
+      return element;
     }
 
-    if (parent == document.body) {
-      delta[0] -= document.body.offsetLeft;
-      delta[1] -= document.body.offsetTop;
+    for (var property in styles) {
+      if (property === 'opacity') {
+        Element.setOpacity(element, styles[property]);
+      } else {
+        var value = styles[property];
+        if (property === 'float' || property === 'cssFloat') {
+          property = Object.isUndefined(elementStyle.styleFloat) ?
+           'cssFloat' : 'styleFloat';
+        }
+        elementStyle[property] = value;
+      }
     }
 
-    if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
-    if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
-    if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
-    if (options.setHeight) element.style.height = source.offsetHeight + 'px';
     return element;
   }
-};
 
-Object.extend(Element.Methods, {
-  getElementsBySelector: Element.Methods.select,
 
-  childElements: Element.Methods.immediateDescendants
-});
+  function getStyle(element, style) {
+    element = $(element);
+    style = normalizeStyleName(style);
 
-Element._attributeTranslations = {
-  write: {
-    names: {
-      className: 'class',
-      htmlFor:   'for'
-    },
-    values: { }
+    var value = element.style[style];
+    if (!value || value === 'auto') {
+      var css = document.defaultView.getComputedStyle(element, null);
+      value = css ? css[style] : null;
+    }
+
+    if (style === 'opacity') return value ? parseFloat(value) : 1.0;
+    return value === 'auto' ? null : value;
   }
-};
 
-if (Prototype.Browser.Opera) {
-  Element.Methods.getStyle = Element.Methods.getStyle.wrap(
-    function(proceed, element, style) {
-      switch (style) {
-        case 'height': case 'width':
-          if (!Element.visible(element)) return null;
+  function getStyle_Opera(element, style) {
+    switch (style) {
+      case 'height': case 'width':
+        if (!Element.visible(element)) return null;
 
-          var dim = parseInt(proceed(element, style), 10);
+        var dim = parseInt(getStyle(element, style), 10);
 
-          if (dim !== element['offset' + style.capitalize()])
-            return dim + 'px';
+        if (dim !== element['offset' + style.capitalize()])
+          return dim + 'px';
 
-          var properties;
-          if (style === 'height') {
-            properties = ['border-top-width', 'padding-top',
-             'padding-bottom', 'border-bottom-width'];
-          }
-          else {
-            properties = ['border-left-width', 'padding-left',
-             'padding-right', 'border-right-width'];
-          }
-          return properties.inject(dim, function(memo, property) {
-            var val = proceed(element, property);
-            return val === null ? memo : memo - parseInt(val, 10);
-          }) + 'px';
-        default: return proceed(element, style);
-      }
-    }
-  );
+        return Element.measure(element, style);
 
-  Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
-    function(proceed, element, attribute) {
-      if (attribute === 'title') return element.title;
-      return proceed(element, attribute);
+      default: return getStyle(element, style);
     }
-  );
-}
+  }
 
-else if (Prototype.Browser.IE) {
-  Element.Methods.getStyle = function(element, style) {
+  function getStyle_IE(element, style) {
     element = $(element);
-    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
+    style = normalizeStyleName_IE(style);
+
     var value = element.style[style];
-    if (!value && element.currentStyle) value = element.currentStyle[style];
+    if (!value && element.currentStyle) {
+      value = element.currentStyle[style];
+    }
 
-    if (style == 'opacity') {
-      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
-        if (value[1]) return parseFloat(value[1]) / 100;
-      return 1.0;
+    if (style === 'opacity') {
+      if (!STANDARD_CSS_OPACITY_SUPPORTED)
+        return getOpacity_IE(element);
+      else return value ? parseFloat(value) : 1.0;
     }
 
-    if (value == 'auto') {
-      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
-        return element['offset' + style.capitalize()] + 'px';
+    if (value === 'auto') {
+      if ((style === 'width' || style === 'height') && Element.visible(element))
+        return Element.measure(element, style) + 'px';
       return null;
     }
+
     return value;
-  };
+  }
 
-  Element.Methods.setOpacity = function(element, value) {
-    function stripAlpha(filter){
-      return filter.replace(/alpha\([^\)]*\)/gi,'');
-    }
-    element = $(element);
-    var currentStyle = element.currentStyle;
-    if ((currentStyle && !currentStyle.hasLayout) ||
-      (!currentStyle && element.style.zoom == 'normal'))
-        element.style.zoom = 1;
+  function stripAlphaFromFilter_IE(filter) {
+    return (filter || '').replace(/alpha\([^\)]*\)/gi, '');
+  }
 
-    var filter = element.getStyle('filter'), style = element.style;
-    if (value == 1 || value === '') {
-      (filter = stripAlpha(filter)) ?
-        style.filter = filter : style.removeAttribute('filter');
-      return element;
-    } else if (value < 0.00001) value = 0;
-    style.filter = stripAlpha(filter) +
-      'alpha(opacity=' + (value * 100) + ')';
+  function hasLayout_IE(element) {
+    if (!element.currentStyle || !element.currentStyle.hasLayout)
+      element.style.zoom = 1;
     return element;
-  };
-
-  Element._attributeTranslations = (function(){
+  }
 
-    var classProp = 'className',
-        forProp = 'for',
-        el = document.createElement('div');
+  var STANDARD_CSS_OPACITY_SUPPORTED = (function() {
+    DIV.style.cssText = "opacity:.55";
+    return /^0.55/.test(DIV.style.opacity);
+  })();
 
-    el.setAttribute(classProp, 'x');
+  function setOpacity(element, value) {
+    element = $(element);
+    if (value == 1 || value === '') value = '';
+    else if (value < 0.00001) value = 0;
+    element.style.opacity = value;
+    return element;
+  }
 
-    if (el.className !== 'x') {
-      el.setAttribute('class', 'x');
-      if (el.className === 'x') {
-        classProp = 'class';
-      }
-    }
-    el = null;
+  function setOpacity_IE(element, value) {
+    if (STANDARD_CSS_OPACITY_SUPPORTED)
+      return setOpacity(element, value);
 
-    el = document.createElement('label');
-    el.setAttribute(forProp, 'x');
-    if (el.htmlFor !== 'x') {
-      el.setAttribute('htmlFor', 'x');
-      if (el.htmlFor === 'x') {
-        forProp = 'htmlFor';
-      }
-    }
-    el = null;
+    element = hasLayout_IE($(element));
+    var filter = Element.getStyle(element, 'filter'),
+     style = element.style;
 
-    return {
-      read: {
-        names: {
-          'class':      classProp,
-          'className':  classProp,
-          'for':        forProp,
-          'htmlFor':    forProp
-        },
-        values: {
-          _getAttr: function(element, attribute) {
-            return element.getAttribute(attribute);
-          },
-          _getAttr2: function(element, attribute) {
-            return element.getAttribute(attribute, 2);
-          },
-          _getAttrNode: function(element, attribute) {
-            var node = element.getAttributeNode(attribute);
-            return node ? node.value : "";
-          },
-          _getEv: (function(){
-
-            var el = document.createElement('div'), f;
-            el.onclick = Prototype.emptyFunction;
-            var value = el.getAttribute('onclick');
-
-            if (String(value).indexOf('{') > -1) {
-              f = function(element, attribute) {
-                attribute = element.getAttribute(attribute);
-                if (!attribute) return null;
-                attribute = attribute.toString();
-                attribute = attribute.split('{')[1];
-                attribute = attribute.split('}')[0];
-                return attribute.strip();
-              };
-            }
-            else if (value === '') {
-              f = function(element, attribute) {
-                attribute = element.getAttribute(attribute);
-                if (!attribute) return null;
-                return attribute.strip();
-              };
-            }
-            el = null;
-            return f;
-          })(),
-          _flag: function(element, attribute) {
-            return $(element).hasAttribute(attribute) ? attribute : null;
-          },
-          style: function(element) {
-            return element.style.cssText.toLowerCase();
-          },
-          title: function(element) {
-            return element.title;
-          }
-        }
-      }
+    if (value == 1 || value === '') {
+      filter = stripAlphaFromFilter_IE(filter);
+      if (filter) style.filter = filter;
+      else style.removeAttribute('filter');
+      return element;
     }
-  })();
 
-  Element._attributeTranslations.write = {
-    names: Object.extend({
-      cellpadding: 'cellPadding',
-      cellspacing: 'cellSpacing'
-    }, Element._attributeTranslations.read.names),
-    values: {
-      checked: function(element, value) {
-        element.checked = !!value;
-      },
+    if (value < 0.00001) value = 0;
 
-      style: function(element, value) {
-        element.style.cssText = value ? value : '';
-      }
-    }
-  };
+    style.filter = stripAlphaFromFilter_IE(filter) +
+     ' alpha(opacity=' + (value * 100) + ')';
 
-  Element._attributeTranslations.has = {};
+    return element;
+  }
 
-  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
-      'encType maxLength readOnly longDesc frameBorder').each(function(attr) {
-    Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
-    Element._attributeTranslations.has[attr.toLowerCase()] = attr;
-  });
 
-  (function(v) {
-    Object.extend(v, {
-      href:        v._getAttr2,
-      src:         v._getAttr2,
-      type:        v._getAttr,
-      action:      v._getAttrNode,
-      disabled:    v._flag,
-      checked:     v._flag,
-      readonly:    v._flag,
-      multiple:    v._flag,
-      onload:      v._getEv,
-      onunload:    v._getEv,
-      onclick:     v._getEv,
-      ondblclick:  v._getEv,
-      onmousedown: v._getEv,
-      onmouseup:   v._getEv,
-      onmouseover: v._getEv,
-      onmousemove: v._getEv,
-      onmouseout:  v._getEv,
-      onfocus:     v._getEv,
-      onblur:      v._getEv,
-      onkeypress:  v._getEv,
-      onkeydown:   v._getEv,
-      onkeyup:     v._getEv,
-      onsubmit:    v._getEv,
-      onreset:     v._getEv,
-      onselect:    v._getEv,
-      onchange:    v._getEv
-    });
-  })(Element._attributeTranslations.read.values);
+  function getOpacity(element) {
+    return Element.getStyle(element, 'opacity');
+  }
 
-  if (Prototype.BrowserFeatures.ElementExtensions) {
-    (function() {
-      function _descendants(element) {
-        var nodes = element.getElementsByTagName('*'), results = [];
-        for (var i = 0, node; node = nodes[i]; i++)
-          if (node.tagName !== "!") // Filter out comment nodes.
-            results.push(node);
-        return results;
-      }
+  function getOpacity_IE(element) {
+    if (STANDARD_CSS_OPACITY_SUPPORTED)
+      return getOpacity(element);
 
-      Element.Methods.down = function(element, expression, index) {
-        element = $(element);
-        if (arguments.length == 1) return element.firstDescendant();
-        return Object.isNumber(expression) ? _descendants(element)[expression] :
-          Element.select(element, expression)[index || 0];
-      }
-    })();
+    var filter = Element.getStyle(element, 'filter');
+    if (filter.length === 0) return 1.0;
+    var match = (filter || '').match(/alpha\(opacity=(.*)\)/i);
+    if (match && match[1]) return parseFloat(match[1]) / 100;
+    return 1.0;
   }
 
-}
 
-else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
-  Element.Methods.setOpacity = function(element, value) {
-    element = $(element);
-    element.style.opacity = (value == 1) ? 0.999999 :
-      (value === '') ? '' : (value < 0.00001) ? 0 : value;
-    return element;
-  };
-}
+  Object.extend(methods, {
+    setStyle:   setStyle,
+    getStyle:   getStyle,
+    setOpacity: setOpacity,
+    getOpacity: getOpacity
+  });
 
-else if (Prototype.Browser.WebKit) {
-  Element.Methods.setOpacity = function(element, value) {
-    element = $(element);
-    element.style.opacity = (value == 1 || value === '') ? '' :
-      (value < 0.00001) ? 0 : value;
-
-    if (value == 1)
-      if (element.tagName.toUpperCase() == 'IMG' && element.width) {
-        element.width++; element.width--;
-      } else try {
-        var n = document.createTextNode(' ');
-        element.appendChild(n);
-        element.removeChild(n);
-      } catch (e) { }
+  if ('styleFloat' in DIV.style) {
+    methods.getStyle = getStyle_IE;
+    methods.setOpacity = setOpacity_IE;
+    methods.getOpacity = getOpacity_IE;
+  }
 
-    return element;
-  };
-}
+  var UID = 0;
 
-if ('outerHTML' in document.documentElement) {
-  Element.Methods.replace = function(element, content) {
-    element = $(element);
+  GLOBAL.Element.Storage = { UID: 1 };
 
-    if (content && content.toElement) content = content.toElement();
-    if (Object.isElement(content)) {
-      element.parentNode.replaceChild(content, element);
-      return element;
-    }
+  function getUniqueElementID(element) {
+    if (element === window) return 0;
 
-    content = Object.toHTML(content);
-    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
+    if (typeof element._prototypeUID === 'undefined')
+      element._prototypeUID = Element.Storage.UID++;
+    return element._prototypeUID;
+  }
 
-    if (Element._insertionTranslations.tags[tagName]) {
-      var nextSibling = element.next(),
-          fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
-      parent.removeChild(element);
-      if (nextSibling)
-        fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
-      else
-        fragments.each(function(node) { parent.appendChild(node) });
-    }
-    else element.outerHTML = content.stripScripts();
+  function getUniqueElementID_IE(element) {
+    if (element === window) return 0;
+    if (element == document) return 1;
+    return element.uniqueID;
+  }
 
-    content.evalScripts.bind(content).defer();
-    return element;
-  };
-}
+  var HAS_UNIQUE_ID_PROPERTY = ('uniqueID' in DIV);
+  if (HAS_UNIQUE_ID_PROPERTY)
+    getUniqueElementID = getUniqueElementID_IE;
 
-Element._returnOffset = function(l, t) {
-  var result = [l, t];
-  result.left = l;
-  result.top = t;
-  return result;
-};
+  function getStorage(element) {
+    if (!(element = $(element))) return;
+
+    var uid = getUniqueElementID(element);
 
-Element._getContentFromAnonymousElement = function(tagName, html, force) {
-  var div = new Element('div'),
-      t = Element._insertionTranslations.tags[tagName];
+    if (!Element.Storage[uid])
+      Element.Storage[uid] = $H();
 
-  var workaround = false;
-  if (t) workaround = true;
-  else if (force) {
-    workaround = true;
-    t = ['', '', 0];
+    return Element.Storage[uid];
   }
 
-  if (workaround) {
-    div.innerHTML = '&nbsp;' + t[0] + html + t[1];
-    div.removeChild(div.firstChild);
-    for (var i = t[2]; i--; ) {
-      div = div.firstChild;
+  function store(element, key, value) {
+    if (!(element = $(element))) return;
+    var storage = getStorage(element);
+    if (arguments.length === 2) {
+      storage.update(key);
+    } else {
+      storage.set(key, value);
     }
+    return element;
   }
-  else {
-    div.innerHTML = html;
-  }
-  return $A(div.childNodes);
-};
 
-Element._insertionTranslations = {
-  before: function(element, node) {
-    element.parentNode.insertBefore(node, element);
-  },
-  top: function(element, node) {
-    element.insertBefore(node, element.firstChild);
-  },
-  bottom: function(element, node) {
-    element.appendChild(node);
-  },
-  after: function(element, node) {
-    element.parentNode.insertBefore(node, element.nextSibling);
-  },
-  tags: {
-    TABLE:  ['<table>',                '</table>',                   1],
-    TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
-    TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
-    TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
-    SELECT: ['<select>',               '</select>',                  1]
-  }
-};
+  function retrieve(element, key, defaultValue) {
+    if (!(element = $(element))) return;
+    var storage = getStorage(element), value = storage.get(key);
 
-(function() {
-  var tags = Element._insertionTranslations.tags;
-  Object.extend(tags, {
-    THEAD: tags.TBODY,
-    TFOOT: tags.TBODY,
-    TH:    tags.TD
-  });
-})();
+    if (Object.isUndefined(value)) {
+      storage.set(key, defaultValue);
+      value = defaultValue;
+    }
 
-Element.Methods.Simulated = {
-  hasAttribute: function(element, attribute) {
-    attribute = Element._attributeTranslations.has[attribute] || attribute;
-    var node = $(element).getAttributeNode(attribute);
-    return !!(node && node.specified);
+    return value;
   }
-};
-
-Element.Methods.ByTag = { };
 
-Object.extend(Element, Element.Methods);
 
-(function(div) {
-
-  if (!Prototype.BrowserFeatures.ElementExtensions && div['__proto__']) {
-    window.HTMLElement = { };
-    window.HTMLElement.prototype = div['__proto__'];
-    Prototype.BrowserFeatures.ElementExtensions = true;
-  }
+  Object.extend(methods, {
+    getStorage: getStorage,
+    store:      store,
+    retrieve:   retrieve
+  });
 
-  div = null;
 
-})(document.createElement('div'));
+  var Methods = {}, ByTag = Element.Methods.ByTag,
+   F = Prototype.BrowserFeatures;
 
-Element.extend = (function() {
+  if (!F.ElementExtensions && ('__proto__' in DIV)) {
+    GLOBAL.HTMLElement = {};
+    GLOBAL.HTMLElement.prototype = DIV['__proto__'];
+    F.ElementExtensions = true;
+  }
 
-  function checkDeficiency(tagName) {
-    if (typeof window.Element != 'undefined') {
-      var proto = window.Element.prototype;
-      if (proto) {
-        var id = '_' + (Math.random()+'').slice(2),
-            el = document.createElement(tagName);
-        proto[id] = 'x';
-        var isBuggy = (el[id] !== 'x');
-        delete proto[id];
-        el = null;
-        return isBuggy;
-      }
+  function checkElementPrototypeDeficiency(tagName) {
+    if (typeof window.Element === 'undefined') return false;
+    if (!HAS_EXTENDED_CREATE_ELEMENT_SYNTAX) return false;
+    var proto = window.Element.prototype;
+    if (proto) {
+      var id = '_' + (Math.random() + '').slice(2),
+       el = document.createElement(tagName);
+      proto[id] = 'x';
+      var isBuggy = (el[id] !== 'x');
+      delete proto[id];
+      el = null;
+      return isBuggy;
     }
+
     return false;
   }
 
+  var HTMLOBJECTELEMENT_PROTOTYPE_BUGGY =
+   checkElementPrototypeDeficiency('object');
+
   function extendElementWith(element, methods) {
     for (var property in methods) {
       var value = methods[property];
@@ -2909,98 +3317,52 @@ Element.extend = (function() {
     }
   }
 
-  var HTMLOBJECTELEMENT_PROTOTYPE_BUGGY = checkDeficiency('object');
-
-  if (Prototype.BrowserFeatures.SpecificElementExtensions) {
-    if (HTMLOBJECTELEMENT_PROTOTYPE_BUGGY) {
-      return function(element) {
-        if (element && typeof element._extendedByPrototype == 'undefined') {
-          var t = element.tagName;
-          if (t && (/^(?:object|applet|embed)$/i.test(t))) {
-            extendElementWith(element, Element.Methods);
-            extendElementWith(element, Element.Methods.Simulated);
-            extendElementWith(element, Element.Methods.ByTag[t.toUpperCase()]);
-          }
-        }
-        return element;
-      }
-    }
-    return Prototype.K;
+  var EXTENDED = {};
+  function elementIsExtended(element) {
+    var uid = getUniqueElementID(element);
+    return (uid in EXTENDED);
   }
 
-  var Methods = { }, ByTag = Element.Methods.ByTag;
-
-  var extend = Object.extend(function(element) {
-    if (!element || typeof element._extendedByPrototype != 'undefined' ||
-        element.nodeType != 1 || element == window) return element;
+  function extend(element) {
+    if (!element || elementIsExtended(element)) return element;
+    if (element.nodeType !== Node.ELEMENT_NODE || element == window)
+      return element;
 
     var methods = Object.clone(Methods),
-        tagName = element.tagName.toUpperCase();
+     tagName = element.tagName.toUpperCase();
 
     if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);
 
     extendElementWith(element, methods);
-
-    element._extendedByPrototype = Prototype.emptyFunction;
+    EXTENDED[getUniqueElementID(element)] = true;
     return element;
+  }
 
-  }, {
-    refresh: function() {
-      if (!Prototype.BrowserFeatures.ElementExtensions) {
-        Object.extend(Methods, Element.Methods);
-        Object.extend(Methods, Element.Methods.Simulated);
-      }
-    }
-  });
-
-  extend.refresh();
-  return extend;
-})();
-
-if (document.documentElement.hasAttribute) {
-  Element.hasAttribute = function(element, attribute) {
-    return element.hasAttribute(attribute);
-  };
-}
-else {
-  Element.hasAttribute = Element.Methods.Simulated.hasAttribute;
-}
-
-Element.addMethods = function(methods) {
-  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;
+  function extend_IE8(element) {
+    if (!element || elementIsExtended(element)) return element;
 
-  if (!methods) {
-    Object.extend(Form, Form.Methods);
-    Object.extend(Form.Element, Form.Element.Methods);
-    Object.extend(Element.Methods.ByTag, {
-      "FORM":     Object.clone(Form.Methods),
-      "INPUT":    Object.clone(Form.Element.Methods),
-      "SELECT":   Object.clone(Form.Element.Methods),
-      "TEXTAREA": Object.clone(Form.Element.Methods),
-      "BUTTON":   Object.clone(Form.Element.Methods)
-    });
-  }
+    var t = element.tagName;
+    if (t && (/^(?:object|applet|embed)$/i.test(t))) {
+      extendElementWith(element, Element.Methods);
+      extendElementWith(element, Element.Methods.Simulated);
+      extendElementWith(element, Element.Methods.ByTag[t.toUpperCase()]);
+    }
 
-  if (arguments.length == 2) {
-    var tagName = methods;
-    methods = arguments[1];
+    return element;
   }
 
-  if (!tagName) Object.extend(Element.Methods, methods || { });
-  else {
-    if (Object.isArray(tagName)) tagName.each(extend);
-    else extend(tagName);
+  if (F.SpecificElementExtensions) {
+    extend = HTMLOBJECTELEMENT_PROTOTYPE_BUGGY ? extend_IE8 : Prototype.K;
   }
 
-  function extend(tagName) {
+  function addMethodsToTagName(tagName, methods) {
     tagName = tagName.toUpperCase();
-    if (!Element.Methods.ByTag[tagName])
-      Element.Methods.ByTag[tagName] = { };
-    Object.extend(Element.Methods.ByTag[tagName], methods);
+    if (!ByTag[tagName]) ByTag[tagName] = {};
+    Object.extend(ByTag[tagName], methods);
   }
 
-  function copy(methods, destination, onlyIfAbsent) {
-    onlyIfAbsent = onlyIfAbsent || false;
+  function mergeMethods(destination, methods, onlyIfAbsent) {
+    if (Object.isUndefined(onlyIfAbsent)) onlyIfAbsent = false;
     for (var property in methods) {
       var value = methods[property];
       if (!Object.isFunction(value)) continue;
@@ -3030,169 +3392,150 @@ Element.addMethods = function(methods) {
     if (window[klass]) return window[klass];
 
     var element = document.createElement(tagName),
-        proto = element['__proto__'] || element.constructor.prototype;
+     proto = element['__proto__'] || element.constructor.prototype;
 
     element = null;
     return proto;
   }
 
-  var elementPrototype = window.HTMLElement ? HTMLElement.prototype :
-   Element.prototype;
+  function addMethods(methods) {
+    if (arguments.length === 0) addFormMethods();
 
-  if (F.ElementExtensions) {
-    copy(Element.Methods, elementPrototype);
-    copy(Element.Methods.Simulated, elementPrototype, true);
-  }
+    if (arguments.length === 2) {
+      var tagName = methods;
+      methods = arguments[1];
+    }
 
-  if (F.SpecificElementExtensions) {
-    for (var tag in Element.Methods.ByTag) {
-      var klass = findDOMClass(tag);
-      if (Object.isUndefined(klass)) continue;
-      copy(T[tag], klass.prototype);
+    if (!tagName) {
+      Object.extend(Element.Methods, methods || {});
+    } else {
+      if (Object.isArray(tagName)) {
+        for (var i = 0, tag; tag = tagName[i]; i++)
+          addMethodsToTagName(tag, methods);
+      } else {
+        addMethodsToTagName(tagName, methods);
+      }
     }
-  }
 
-  Object.extend(Element, Element.Methods);
-  delete Element.ByTag;
+    var ELEMENT_PROTOTYPE = window.HTMLElement ? HTMLElement.prototype :
+     Element.prototype;
 
-  if (Element.extend.refresh) Element.extend.refresh();
-  Element.cache = { };
-};
+    if (F.ElementExtensions) {
+      mergeMethods(ELEMENT_PROTOTYPE, Element.Methods);
+      mergeMethods(ELEMENT_PROTOTYPE, Element.Methods.Simulated, true);
+    }
 
+    if (F.SpecificElementExtensions) {
+      for (var tag in Element.Methods.ByTag) {
+        var klass = findDOMClass(tag);
+        if (Object.isUndefined(klass)) continue;
+        mergeMethods(klass.prototype, ByTag[tag]);
+      }
+    }
 
-document.viewport = {
+    Object.extend(Element, Element.Methods);
+    Object.extend(Element, Element.Methods.Simulated);
+    delete Element.ByTag;
+    delete Element.Simulated;
 
-  getDimensions: function() {
-    return { width: this.getWidth(), height: this.getHeight() };
-  },
+    Element.extend.refresh();
 
-  getScrollOffsets: function() {
-    return Element._returnOffset(
-      window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
-      window.pageYOffset || document.documentElement.scrollTop  || document.body.scrollTop);
+    ELEMENT_CACHE = {};
   }
-};
-
-(function(viewport) {
-  var B = Prototype.Browser, doc = document, element, property = {};
 
-  function getRootElement() {
-    if (B.WebKit && !doc.evaluate)
-      return document;
+  Object.extend(GLOBAL.Element, {
+    extend:     extend,
+    addMethods: addMethods
+  });
 
-    if (B.Opera && window.parseFloat(window.opera.version()) < 9.5)
-      return document.body;
+  if (extend === Prototype.K) {
+    GLOBAL.Element.extend.refresh = Prototype.emptyFunction;
+  } else {
+    GLOBAL.Element.extend.refresh = function() {
+      if (Prototype.BrowserFeatures.ElementExtensions) return;
+      Object.extend(Methods, Element.Methods);
+      Object.extend(Methods, Element.Methods.Simulated);
 
-    return document.documentElement;
+      EXTENDED = {};
+    };
   }
 
-  function define(D) {
-    if (!element) element = getRootElement();
-
-    property[D] = 'client' + D;
-
-    viewport['get' + D] = function() { return element[property[D]] };
-    return viewport['get' + D]();
+  function addFormMethods() {
+    Object.extend(Form, Form.Methods);
+    Object.extend(Form.Element, Form.Element.Methods);
+    Object.extend(Element.Methods.ByTag, {
+      "FORM":     Object.clone(Form.Methods),
+      "INPUT":    Object.clone(Form.Element.Methods),
+      "SELECT":   Object.clone(Form.Element.Methods),
+      "TEXTAREA": Object.clone(Form.Element.Methods),
+      "BUTTON":   Object.clone(Form.Element.Methods)
+    });
   }
 
-  viewport.getWidth  = define.curry('Width');
+  Element.addMethods(methods);
 
-  viewport.getHeight = define.curry('Height');
-})(document.viewport);
-
-
-Element.Storage = {
-  UID: 1
-};
-
-Element.addMethods({
-  getStorage: function(element) {
-    if (!(element = $(element))) return;
+  function destroyCache_IE() {
+    DIV = null;
+    ELEMENT_CACHE = null;
+  }
 
-    var uid;
-    if (element === window) {
-      uid = 0;
-    } else {
-      if (typeof element._prototypeUID === "undefined")
-        element._prototypeUID = Element.Storage.UID++;
-      uid = element._prototypeUID;
-    }
+  if (window.attachEvent)
+    window.attachEvent('onunload', destroyCache_IE);
 
-    if (!Element.Storage[uid])
-      Element.Storage[uid] = $H();
+})(this);
+(function() {
 
-    return Element.Storage[uid];
-  },
+  function toDecimal(pctString) {
+    var match = pctString.match(/^(\d+)%?$/i);
+    if (!match) return null;
+    return (Number(match[1]) / 100);
+  }
 
-  store: function(element, key, value) {
-    if (!(element = $(element))) return;
+  function getRawStyle(element, style) {
+    element = $(element);
 
-    if (arguments.length === 2) {
-      Element.getStorage(element).update(key);
-    } else {
-      Element.getStorage(element).set(key, value);
+    var value = element.style[style];
+    if (!value || value === 'auto') {
+      var css = document.defaultView.getComputedStyle(element, null);
+      value = css ? css[style] : null;
     }
 
-    return element;
-  },
-
-  retrieve: function(element, key, defaultValue) {
-    if (!(element = $(element))) return;
-    var hash = Element.getStorage(element), value = hash.get(key);
+    if (style === 'opacity') return value ? parseFloat(value) : 1.0;
+    return value === 'auto' ? null : value;
+  }
 
-    if (Object.isUndefined(value)) {
-      hash.set(key, defaultValue);
-      value = defaultValue;
+  function getRawStyle_IE(element, style) {
+    var value = element.style[style];
+    if (!value && element.currentStyle) {
+      value = element.currentStyle[style];
     }
-
     return value;
-  },
-
-  clone: function(element, deep) {
-    if (!(element = $(element))) return;
-    var clone = element.cloneNode(deep);
-    clone._prototypeUID = void 0;
-    if (deep) {
-      var descendants = Element.select(clone, '*'),
-          i = descendants.length;
-      while (i--) {
-        descendants[i]._prototypeUID = void 0;
-      }
-    }
-    return Element.extend(clone);
-  },
-
-  purge: function(element) {
-    if (!(element = $(element))) return;
-    var purgeElement = Element._purgeElement;
-
-    purgeElement(element);
+  }
 
-    var descendants = element.getElementsByTagName('*'),
-     i = descendants.length;
+  function getContentWidth(element, context) {
+    var boxWidth = element.offsetWidth;
 
-    while (i--) purgeElement(descendants[i]);
+    var bl = getPixelValue(element, 'borderLeftWidth',  context) || 0;
+    var br = getPixelValue(element, 'borderRightWidth', context) || 0;
+    var pl = getPixelValue(element, 'paddingLeft',      context) || 0;
+    var pr = getPixelValue(element, 'paddingRight',     context) || 0;
 
-    return null;
+    return boxWidth - bl - br - pl - pr;
   }
-});
-
-(function() {
 
-  function toDecimal(pctString) {
-    var match = pctString.match(/^(\d+)%?$/i);
-    if (!match) return null;
-    return (Number(match[1]) / 100);
+  if (!Object.isUndefined(document.documentElement.currentStyle) && !Prototype.Browser.Opera) {
+    getRawStyle = getRawStyle_IE;
   }
 
+
   function getPixelValue(value, property, context) {
     var element = null;
     if (Object.isElement(value)) {
       element = value;
-      value = element.getStyle(property);
+      value = getRawStyle(element, property);
     }
 
-    if (value === null) {
+    if (value === null || Object.isUndefined(value)) {
       return null;
     }
 
@@ -3215,14 +3558,12 @@ Element.addMethods({
 
     if (element && isPercentage) {
       context = context || element.parentNode;
-      var decimal = toDecimal(value);
-      var whole = null;
-      var position = element.getStyle('position');
+      var decimal = toDecimal(value), whole = null;
 
       var isHorizontal = property.include('left') || property.include('right') ||
        property.include('width');
 
-      var isVertical =  property.include('top') || property.include('bottom') ||
+      var isVertical   = property.include('top') || property.include('bottom') ||
         property.include('height');
 
       if (context === document.viewport) {
@@ -3246,14 +3587,12 @@ Element.addMethods({
   }
 
   function toCSSPixels(number) {
-    if (Object.isString(number) && number.endsWith('px')) {
+    if (Object.isString(number) && number.endsWith('px'))
       return number;
-    }
     return number + 'px';
   }
 
   function isDisplayed(element) {
-    var originalElement = element;
     while (element && element.parentNode) {
       var display = element.getStyle('display');
       if (display === 'none') {
@@ -3311,14 +3650,15 @@ Element.addMethods({
     },
 
     _begin: function() {
-      if (this._prepared) return;
+      if (this._isPrepared()) return;
 
       var element = this.element;
       if (isDisplayed(element)) {
-        this._prepared = true;
+        this._setPrepared(true);
         return;
       }
 
+
       var originalStyles = {
         position:   element.style.position   || '',
         width:      element.style.width      || '',
@@ -3328,30 +3668,30 @@ Element.addMethods({
 
       element.store('prototype_original_styles', originalStyles);
 
-      var position = element.getStyle('position'),
-       width = element.getStyle('width');
+      var position = getRawStyle(element, 'position'), width = element.offsetWidth;
 
-      if (width === "0px" || width === null) {
+      if (width === 0 || width === null) {
         element.style.display = 'block';
-        width = element.getStyle('width');
+        width = element.offsetWidth;
       }
 
       var context = (position === 'fixed') ? document.viewport :
        element.parentNode;
 
-      element.setStyle({
-        position:   'absolute',
+      var tempStyles = {
         visibility: 'hidden',
         display:    'block'
-      });
+      };
+
+      if (position !== 'fixed') tempStyles.position = 'absolute';
 
-      var positionedWidth = element.getStyle('width');
+      element.setStyle(tempStyles);
 
-      var newWidth;
+      var positionedWidth = element.offsetWidth, newWidth;
       if (width && (positionedWidth === width)) {
-        newWidth = getPixelValue(element, 'width', context);
+        newWidth = getContentWidth(element, context);
       } else if (position === 'absolute' || position === 'fixed') {
-        newWidth = getPixelValue(element, 'width', context);
+        newWidth = getContentWidth(element, context);
       } else {
         var parent = element.parentNode, pLayout = $(parent).getLayout();
 
@@ -3366,7 +3706,7 @@ Element.addMethods({
 
       element.setStyle({ width: newWidth + 'px' });
 
-      this._prepared = true;
+      this._setPrepared(true);
     },
 
     _end: function() {
@@ -3374,7 +3714,7 @@ Element.addMethods({
       var originalStyles = element.retrieve('prototype_original_styles');
       element.store('prototype_original_styles', null);
       element.setStyle(originalStyles);
-      this._prepared = false;
+      this._setPrepared(false);
     },
 
     _compute: function(property) {
@@ -3386,6 +3726,14 @@ Element.addMethods({
       return this._set(property, COMPUTATIONS[property].call(this, this.element));
     },
 
+    _isPrepared: function() {
+      return this.element.retrieve('prototype_element_layout_prepared', false);
+    },
+
+    _setPrepared: function(bool) {
+      return this.element.store('prototype_element_layout_prepared', bool);
+    },
+
     toObject: function() {
       var args = $A(arguments);
       var keys = (args.length === 0) ? Element.Layout.PROPERTIES :
@@ -3467,7 +3815,6 @@ Element.addMethods({
          pRight = this.get('padding-right');
 
         if (!this._preComputing) this._end();
-
         return bWidth - bLeft - bRight - pLeft - pRight;
       },
 
@@ -3658,6 +4005,14 @@ Element.addMethods({
     return $(element).getLayout().get(property);
   }
 
+  function getHeight(element) {
+    return Element.getDimensions(element).height;
+  }
+
+  function getWidth(element) {
+    return Element.getDimensions(element).width;
+  }
+
   function getDimensions(element) {
     element = $(element);
     var display = Element.getStyle(element, 'display');
@@ -3696,15 +4051,19 @@ Element.addMethods({
   function getOffsetParent(element) {
     element = $(element);
 
+    function selfOrBody(element) {
+      return isHtml(element) ? $(document.body) : $(element);
+    }
+
     if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))
       return $(document.body);
 
     var isInline = (Element.getStyle(element, 'display') === 'inline');
-    if (!isInline && element.offsetParent) return $(element.offsetParent);
+    if (!isInline && element.offsetParent) return selfOrBody(element.offsetParent);
 
     while ((element = element.parentNode) && element !== document.body) {
       if (Element.getStyle(element, 'position') !== 'static') {
-        return isHtml(element) ? $(document.body) : $(element);
+        return selfOrBody(element);
       }
     }
 
@@ -3742,8 +4101,8 @@ Element.addMethods({
       }
     } while (element);
 
-    valueL -= layout.get('margin-top');
-    valueT -= layout.get('margin-left');
+    valueL -= layout.get('margin-left');
+    valueT -= layout.get('margin-top');
 
     return new Element.Offset(valueL, valueT);
   }
@@ -3751,17 +4110,24 @@ Element.addMethods({
   function cumulativeScrollOffset(element) {
     var valueT = 0, valueL = 0;
     do {
-      valueT += element.scrollTop  || 0;
-      valueL += element.scrollLeft || 0;
-      element = element.parentNode;
+      if (element === document.body) {
+        var bodyScrollNode = document.documentElement || document.body.parentNode || document.body;
+        valueT += !Object.isUndefined(window.pageYOffset) ? window.pageYOffset : bodyScrollNode.scrollTop || 0;
+        valueL += !Object.isUndefined(window.pageXOffset) ? window.pageXOffset : bodyScrollNode.scrollLeft || 0;
+        break;
+      } else {
+        valueT += element.scrollTop  || 0;
+        valueL += element.scrollLeft || 0;
+        element = element.parentNode;
+      }
     } while (element);
     return new Element.Offset(valueL, valueT);
   }
 
   function viewportOffset(forElement) {
-    element = $(element);
     var valueT = 0, valueL = 0, docBody = document.body;
 
+    forElement = $(forElement);
     var element = forElement;
     do {
       valueT += element.offsetTop  || 0;
@@ -3795,10 +4161,11 @@ Element.addMethods({
     var layout = element.getLayout();
 
     element.store('prototype_absolutize_original_styles', {
-      left:   element.getStyle('left'),
-      top:    element.getStyle('top'),
-      width:  element.getStyle('width'),
-      height: element.getStyle('height')
+      position: element.getStyle('position'),
+      left:     element.getStyle('left'),
+      top:      element.getStyle('top'),
+      width:    element.getStyle('width'),
+      height:   element.getStyle('height')
     });
 
     element.setStyle({
@@ -3825,6 +4192,142 @@ Element.addMethods({
     return element;
   }
 
+
+  function scrollTo(element) {
+    element = $(element);
+    var pos = Element.cumulativeOffset(element);
+    window.scrollTo(pos.left, pos.top);
+    return element;
+  }
+
+
+  function makePositioned(element) {
+    element = $(element);
+    var position = Element.getStyle(element, 'position'), styles = {};
+    if (position === 'static' || !position) {
+      styles.position = 'relative';
+      if (Prototype.Browser.Opera) {
+        styles.top  = 0;
+        styles.left = 0;
+      }
+      Element.setStyle(element, styles);
+      Element.store(element, 'prototype_made_positioned', true);
+    }
+    return element;
+  }
+
+  function undoPositioned(element) {
+    element = $(element);
+    var storage = Element.getStorage(element),
+     madePositioned = storage.get('prototype_made_positioned');
+
+    if (madePositioned) {
+      storage.unset('prototype_made_positioned');
+      Element.setStyle(element, {
+        position: '',
+        top:      '',
+        bottom:   '',
+        left:     '',
+        right:    ''
+      });
+    }
+    return element;
+  }
+
+  function makeClipping(element) {
+    element = $(element);
+
+    var storage = Element.getStorage(element),
+     madeClipping = storage.get('prototype_made_clipping');
+
+    if (Object.isUndefined(madeClipping)) {
+      var overflow = Element.getStyle(element, 'overflow');
+      storage.set('prototype_made_clipping', overflow);
+      if (overflow !== 'hidden')
+        element.style.overflow = 'hidden';
+    }
+
+    return element;
+  }
+
+  function undoClipping(element) {
+    element = $(element);
+    var storage = Element.getStorage(element),
+     overflow = storage.get('prototype_made_clipping');
+
+    if (!Object.isUndefined(overflow)) {
+      storage.unset('prototype_made_clipping');
+      element.style.overflow = overflow || '';
+    }
+
+    return element;
+  }
+
+  function clonePosition(element, source, options) {
+    options = Object.extend({
+      setLeft:    true,
+      setTop:     true,
+      setWidth:   true,
+      setHeight:  true,
+      offsetTop:  0,
+      offsetLeft: 0
+    }, options || {});
+
+    var docEl = document.documentElement;
+
+    source  = $(source);
+    element = $(element);
+    var p, delta, layout, styles = {};
+
+    if (options.setLeft || options.setTop) {
+      p = Element.viewportOffset(source);
+      delta = [0, 0];
+      if (Element.getStyle(element, 'position') === 'absolute') {
+        var parent = Element.getOffsetParent(element);
+        if (parent !== document.body) delta = Element.viewportOffset(parent);
+      }
+    }
+
+    function pageScrollXY() {
+      var x = 0, y = 0;
+      if (Object.isNumber(window.pageXOffset)) {
+        x = window.pageXOffset;
+        y = window.pageYOffset;
+      } else if (document.body && (document.body.scrollLeft || document.body.scrollTop)) {
+        x = document.body.scrollLeft;
+        y = document.body.scrollTop;
+      } else if (docEl && (docEl.scrollLeft || docEl.scrollTop)) {
+        x = docEl.scrollLeft;
+        y = docEl.scrollTop;
+      }
+      return { x: x, y: y };
+    }
+
+    var pageXY = pageScrollXY();
+
+
+    if (options.setWidth || options.setHeight) {
+      layout = Element.getLayout(source);
+    }
+
+    if (options.setLeft)
+      styles.left = (p[0] + pageXY.x - delta[0] + options.offsetLeft) + 'px';
+    if (options.setTop)
+      styles.top  = (p[1] + pageXY.y - delta[1] + options.offsetTop)  + 'px';
+
+    var currentLayout = element.getLayout();
+
+    if (options.setWidth) {
+      styles.width = layout.get('width')  + 'px';
+    }
+    if (options.setHeight) {
+      styles.height = layout.get('height') + 'px';
+    }
+
+    return Element.setStyle(element, styles);
+  }
+
+
   if (Prototype.Browser.IE) {
     getOffsetParent = getOffsetParent.wrap(
       function(proceed, element) {
@@ -3865,8 +4368,9 @@ Element.addMethods({
       do {
         valueT += element.offsetTop  || 0;
         valueL += element.offsetLeft || 0;
-        if (element.offsetParent == document.body)
+        if (element.offsetParent == document.body) {
           if (Element.getStyle(element, 'position') == 'absolute') break;
+        }
 
         element = element.offsetParent;
       } while (element);
@@ -3879,6 +4383,8 @@ Element.addMethods({
   Element.addMethods({
     getLayout:              getLayout,
     measure:                measure,
+    getWidth:               getWidth,
+    getHeight:              getHeight,
     getDimensions:          getDimensions,
     getOffsetParent:        getOffsetParent,
     cumulativeOffset:       cumulativeOffset,
@@ -3886,7 +4392,13 @@ Element.addMethods({
     cumulativeScrollOffset: cumulativeScrollOffset,
     viewportOffset:         viewportOffset,
     absolutize:             absolutize,
-    relativize:             relativize
+    relativize:             relativize,
+    scrollTo:               scrollTo,
+    makePositioned:         makePositioned,
+    undoPositioned:         undoPositioned,
+    makeClipping:           makeClipping,
+    undoClipping:           undoClipping,
+    clonePosition:          clonePosition
   });
 
   function isBody(element) {
@@ -3919,6 +4431,49 @@ Element.addMethods({
       }
     });
   }
+
+
+})();
+
+(function() {
+
+  var IS_OLD_OPERA = Prototype.Browser.Opera &&
+   (window.parseFloat(window.opera.version()) < 9.5);
+  var ROOT = null;
+  function getRootElement() {
+    if (ROOT) return ROOT;
+    ROOT = IS_OLD_OPERA ? document.body : document.documentElement;
+    return ROOT;
+  }
+
+  function getDimensions() {
+    return { width: this.getWidth(), height: this.getHeight() };
+  }
+
+  function getWidth() {
+    return getRootElement().clientWidth;
+  }
+
+  function getHeight() {
+    return getRootElement().clientHeight;
+  }
+
+  function getScrollOffsets() {
+    var x = window.pageXOffset || document.documentElement.scrollLeft ||
+     document.body.scrollLeft;
+    var y = window.pageYOffset || document.documentElement.scrollTop ||
+     document.body.scrollTop;
+
+    return new Element.Offset(x, y);
+  }
+
+  document.viewport = {
+    getDimensions:    getDimensions,
+    getWidth:         getWidth,
+    getHeight:        getHeight,
+    getScrollOffsets: getScrollOffsets
+  };
+
 })();
 window.$$ = function() {
   var expression = $A(arguments).join(', ');
@@ -3965,982 +4520,1775 @@ Prototype.Selector = (function() {
   };
 })();
 Prototype._original_property = window.Sizzle;
+
+;(function () {
+  function fakeDefine(fn) {
+    Prototype._actual_sizzle = fn();
+  }
+  fakeDefine.amd = true;
+
+  if (typeof define !== 'undefined' && define.amd) {
+    Prototype._original_define = define;
+    Prototype._actual_sizzle = null;
+    window.define = fakeDefine;
+  }
+})();
+
 /*!
- * Sizzle CSS Selector Engine - v1.0
- *  Copyright 2009, The Dojo Foundation
- *  Released under the MIT, BSD, and GPL Licenses.
- *  More information: http://sizzlejs.com/
+ * Sizzle CSS Selector Engine v1.10.18
+ * http://sizzlejs.com/
+ *
+ * Copyright 2013 jQuery Foundation, Inc. and other contributors
+ * Released under the MIT license
+ * http://jquery.org/license
+ *
+ * Date: 2014-02-05
  */
-(function(){
-
-var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^[\]]*\]|['"][^'"]*['"]|[^[\]'"]+)+\]|\\.|[^ >+~,(\[\\]+)+|[>+~])(\s*,\s*)?((?:.|\r|\n)*)/g,
+(function( window ) {
+
+var i,
+	support,
+	Expr,
+	getText,
+	isXML,
+	compile,
+	select,
+	outermostContext,
+	sortInput,
+	hasDuplicate,
+
+	setDocument,
+	document,
+	docElem,
+	documentIsHTML,
+	rbuggyQSA,
+	rbuggyMatches,
+	matches,
+	contains,
+
+	expando = "sizzle" + -(new Date()),
+	preferredDoc = window.document,
+	dirruns = 0,
 	done = 0,
-	toString = Object.prototype.toString,
-	hasDuplicate = false,
-	baseHasDuplicate = true;
+	classCache = createCache(),
+	tokenCache = createCache(),
+	compilerCache = createCache(),
+	sortOrder = function( a, b ) {
+		if ( a === b ) {
+			hasDuplicate = true;
+		}
+		return 0;
+	},
 
-[0, 0].sort(function(){
-	baseHasDuplicate = false;
-	return 0;
-});
+	strundefined = typeof undefined,
+	MAX_NEGATIVE = 1 << 31,
+
+	hasOwn = ({}).hasOwnProperty,
+	arr = [],
+	pop = arr.pop,
+	push_native = arr.push,
+	push = arr.push,
+	slice = arr.slice,
+	indexOf = arr.indexOf || function( elem ) {
+		var i = 0,
+			len = this.length;
+		for ( ; i < len; i++ ) {
+			if ( this[i] === elem ) {
+				return i;
+			}
+		}
+		return -1;
+	},
 
-var Sizzle = function(selector, context, results, seed) {
-	results = results || [];
-	var origContext = context = context || document;
+	booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
 
-	if ( context.nodeType !== 1 && context.nodeType !== 9 ) {
-		return [];
-	}
 
-	if ( !selector || typeof selector !== "string" ) {
-		return results;
-	}
+	whitespace = "[\\x20\\t\\r\\n\\f]",
+	characterEncoding = "(?:\\\\.|[\\w-]|[^\\x00-\\xa0])+",
 
-	var parts = [], m, set, checkSet, check, mode, extra, prune = true, contextXML = isXML(context),
-		soFar = selector;
+	identifier = characterEncoding.replace( "w", "w#" ),
 
-	while ( (chunker.exec(""), m = chunker.exec(soFar)) !== null ) {
-		soFar = m[3];
+	attributes = "\\[" + whitespace + "*(" + characterEncoding + ")" + whitespace +
+		"*(?:([*^$|!~]?=)" + whitespace + "*(?:(['\"])((?:\\\\.|[^\\\\])*?)\\3|(" + identifier + ")|)|)" + whitespace + "*\\]",
 
-		parts.push( m[1] );
+	pseudos = ":(" + characterEncoding + ")(?:\\(((['\"])((?:\\\\.|[^\\\\])*?)\\3|((?:\\\\.|[^\\\\()[\\]]|" + attributes.replace( 3, 8 ) + ")*)|.*)\\)|)",
 
-		if ( m[2] ) {
-			extra = m[3];
-			break;
+	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
+
+	rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
+	rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),
+
+	rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),
+
+	rpseudo = new RegExp( pseudos ),
+	ridentifier = new RegExp( "^" + identifier + "$" ),
+
+	matchExpr = {
+		"ID": new RegExp( "^#(" + characterEncoding + ")" ),
+		"CLASS": new RegExp( "^\\.(" + characterEncoding + ")" ),
+		"TAG": new RegExp( "^(" + characterEncoding.replace( "w", "w*" ) + ")" ),
+		"ATTR": new RegExp( "^" + attributes ),
+		"PSEUDO": new RegExp( "^" + pseudos ),
+		"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
+			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
+			"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
+		"bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
+		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
+			whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
+	},
+
+	rinputs = /^(?:input|select|textarea|button)$/i,
+	rheader = /^h\d$/i,
+
+	rnative = /^[^{]+\{\s*\[native \w/,
+
+	rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,
+
+	rsibling = /[+~]/,
+	rescape = /'|\\/g,
+
+	runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
+	funescape = function( _, escaped, escapedWhitespace ) {
+		var high = "0x" + escaped - 0x10000;
+		return high !== high || escapedWhitespace ?
+			escaped :
+			high < 0 ?
+				String.fromCharCode( high + 0x10000 ) :
+				String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
+	};
+
+try {
+	push.apply(
+		(arr = slice.call( preferredDoc.childNodes )),
+		preferredDoc.childNodes
+	);
+	arr[ preferredDoc.childNodes.length ].nodeType;
+} catch ( e ) {
+	push = { apply: arr.length ?
+
+		function( target, els ) {
+			push_native.apply( target, slice.call(els) );
+		} :
+
+		function( target, els ) {
+			var j = target.length,
+				i = 0;
+			while ( (target[j++] = els[i++]) ) {}
+			target.length = j - 1;
 		}
+	};
+}
+
+function Sizzle( selector, context, results, seed ) {
+	var match, elem, m, nodeType,
+		i, groups, old, nid, newContext, newSelector;
+
+	if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
+		setDocument( context );
 	}
 
-	if ( parts.length > 1 && origPOS.exec( selector ) ) {
-		if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
-			set = posProcess( parts[0] + parts[1], context );
-		} else {
-			set = Expr.relative[ parts[0] ] ?
-				[ context ] :
-				Sizzle( parts.shift(), context );
+	context = context || document;
+	results = results || [];
 
-			while ( parts.length ) {
-				selector = parts.shift();
+	if ( !selector || typeof selector !== "string" ) {
+		return results;
+	}
 
-				if ( Expr.relative[ selector ] )
-					selector += parts.shift();
+	if ( (nodeType = context.nodeType) !== 1 && nodeType !== 9 ) {
+		return [];
+	}
 
-				set = posProcess( selector, set );
-			}
-		}
-	} else {
-		if ( !seed && parts.length > 1 && context.nodeType === 9 && !contextXML &&
-				Expr.match.ID.test(parts[0]) && !Expr.match.ID.test(parts[parts.length - 1]) ) {
-			var ret = Sizzle.find( parts.shift(), context, contextXML );
-			context = ret.expr ? Sizzle.filter( ret.expr, ret.set )[0] : ret.set[0];
-		}
+	if ( documentIsHTML && !seed ) {
 
-		if ( context ) {
-			var ret = seed ?
-				{ expr: parts.pop(), set: makeArray(seed) } :
-				Sizzle.find( parts.pop(), parts.length === 1 && (parts[0] === "~" || parts[0] === "+") && context.parentNode ? context.parentNode : context, contextXML );
-			set = ret.expr ? Sizzle.filter( ret.expr, ret.set ) : ret.set;
+		if ( (match = rquickExpr.exec( selector )) ) {
+			if ( (m = match[1]) ) {
+				if ( nodeType === 9 ) {
+					elem = context.getElementById( m );
+					if ( elem && elem.parentNode ) {
+						if ( elem.id === m ) {
+							results.push( elem );
+							return results;
+						}
+					} else {
+						return results;
+					}
+				} else {
+					if ( context.ownerDocument && (elem = context.ownerDocument.getElementById( m )) &&
+						contains( context, elem ) && elem.id === m ) {
+						results.push( elem );
+						return results;
+					}
+				}
 
-			if ( parts.length > 0 ) {
-				checkSet = makeArray(set);
-			} else {
-				prune = false;
+			} else if ( match[2] ) {
+				push.apply( results, context.getElementsByTagName( selector ) );
+				return results;
+
+			} else if ( (m = match[3]) && support.getElementsByClassName && context.getElementsByClassName ) {
+				push.apply( results, context.getElementsByClassName( m ) );
+				return results;
 			}
+		}
+
+		if ( support.qsa && (!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
+			nid = old = expando;
+			newContext = context;
+			newSelector = nodeType === 9 && selector;
 
-			while ( parts.length ) {
-				var cur = parts.pop(), pop = cur;
+			if ( nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
+				groups = tokenize( selector );
 
-				if ( !Expr.relative[ cur ] ) {
-					cur = "";
+				if ( (old = context.getAttribute("id")) ) {
+					nid = old.replace( rescape, "\\$&" );
 				} else {
-					pop = parts.pop();
+					context.setAttribute( "id", nid );
 				}
+				nid = "[id='" + nid + "'] ";
 
-				if ( pop == null ) {
-					pop = context;
+				i = groups.length;
+				while ( i-- ) {
+					groups[i] = nid + toSelector( groups[i] );
 				}
+				newContext = rsibling.test( selector ) && testContext( context.parentNode ) || context;
+				newSelector = groups.join(",");
+			}
 
-				Expr.relative[ cur ]( checkSet, pop, contextXML );
+			if ( newSelector ) {
+				try {
+					push.apply( results,
+						newContext.querySelectorAll( newSelector )
+					);
+					return results;
+				} catch(qsaError) {
+				} finally {
+					if ( !old ) {
+						context.removeAttribute("id");
+					}
+				}
 			}
-		} else {
-			checkSet = parts = [];
 		}
 	}
 
-	if ( !checkSet ) {
-		checkSet = set;
+	return select( selector.replace( rtrim, "$1" ), context, results, seed );
+}
+
+/**
+ * Create key-value caches of limited size
+ * @returns {Function(string, Object)} Returns the Object data after storing it on itself with
+ *	property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
+ *	deleting the oldest entry
+ */
+function createCache() {
+	var keys = [];
+
+	function cache( key, value ) {
+		if ( keys.push( key + " " ) > Expr.cacheLength ) {
+			delete cache[ keys.shift() ];
+		}
+		return (cache[ key + " " ] = value);
 	}
+	return cache;
+}
+
+/**
+ * Mark a function for special use by Sizzle
+ * @param {Function} fn The function to mark
+ */
+function markFunction( fn ) {
+	fn[ expando ] = true;
+	return fn;
+}
+
+/**
+ * Support testing using an element
+ * @param {Function} fn Passed the created div and expects a boolean result
+ */
+function assert( fn ) {
+	var div = document.createElement("div");
 
-	if ( !checkSet ) {
-		throw "Syntax error, unrecognized expression: " + (cur || selector);
+	try {
+		return !!fn( div );
+	} catch (e) {
+		return false;
+	} finally {
+		if ( div.parentNode ) {
+			div.parentNode.removeChild( div );
+		}
+		div = null;
 	}
+}
 
-	if ( toString.call(checkSet) === "[object Array]" ) {
-		if ( !prune ) {
-			results.push.apply( results, checkSet );
-		} else if ( context && context.nodeType === 1 ) {
-			for ( var i = 0; checkSet[i] != null; i++ ) {
-				if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && contains(context, checkSet[i])) ) {
-					results.push( set[i] );
-				}
-			}
-		} else {
-			for ( var i = 0; checkSet[i] != null; i++ ) {
-				if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
-					results.push( set[i] );
-				}
+/**
+ * Adds the same handler for all of the specified attrs
+ * @param {String} attrs Pipe-separated list of attributes
+ * @param {Function} handler The method that will be applied
+ */
+function addHandle( attrs, handler ) {
+	var arr = attrs.split("|"),
+		i = attrs.length;
+
+	while ( i-- ) {
+		Expr.attrHandle[ arr[i] ] = handler;
+	}
+}
+
+/**
+ * Checks document order of two siblings
+ * @param {Element} a
+ * @param {Element} b
+ * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
+ */
+function siblingCheck( a, b ) {
+	var cur = b && a,
+		diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
+			( ~b.sourceIndex || MAX_NEGATIVE ) -
+			( ~a.sourceIndex || MAX_NEGATIVE );
+
+	if ( diff ) {
+		return diff;
+	}
+
+	if ( cur ) {
+		while ( (cur = cur.nextSibling) ) {
+			if ( cur === b ) {
+				return -1;
 			}
 		}
-	} else {
-		makeArray( checkSet, results );
 	}
 
-	if ( extra ) {
-		Sizzle( extra, origContext, results, seed );
-		Sizzle.uniqueSort( results );
-	}
+	return a ? 1 : -1;
+}
 
-	return results;
-};
+/**
+ * Returns a function to use in pseudos for input types
+ * @param {String} type
+ */
+function createInputPseudo( type ) {
+	return function( elem ) {
+		var name = elem.nodeName.toLowerCase();
+		return name === "input" && elem.type === type;
+	};
+}
 
-Sizzle.uniqueSort = function(results){
-	if ( sortOrder ) {
-		hasDuplicate = baseHasDuplicate;
-		results.sort(sortOrder);
+/**
+ * Returns a function to use in pseudos for buttons
+ * @param {String} type
+ */
+function createButtonPseudo( type ) {
+	return function( elem ) {
+		var name = elem.nodeName.toLowerCase();
+		return (name === "input" || name === "button") && elem.type === type;
+	};
+}
 
-		if ( hasDuplicate ) {
-			for ( var i = 1; i < results.length; i++ ) {
-				if ( results[i] === results[i-1] ) {
-					results.splice(i--, 1);
+/**
+ * Returns a function to use in pseudos for positionals
+ * @param {Function} fn
+ */
+function createPositionalPseudo( fn ) {
+	return markFunction(function( argument ) {
+		argument = +argument;
+		return markFunction(function( seed, matches ) {
+			var j,
+				matchIndexes = fn( [], seed.length, argument ),
+				i = matchIndexes.length;
+
+			while ( i-- ) {
+				if ( seed[ (j = matchIndexes[i]) ] ) {
+					seed[j] = !(matches[j] = seed[j]);
 				}
 			}
-		}
-	}
+		});
+	});
+}
 
-	return results;
-};
+/**
+ * Checks a node for validity as a Sizzle context
+ * @param {Element|Object=} context
+ * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
+ */
+function testContext( context ) {
+	return context && typeof context.getElementsByTagName !== strundefined && context;
+}
+
+support = Sizzle.support = {};
 
-Sizzle.matches = function(expr, set){
-	return Sizzle(expr, null, null, set);
+/**
+ * Detects XML nodes
+ * @param {Element|Object} elem An element or a document
+ * @returns {Boolean} True iff elem is a non-HTML XML node
+ */
+isXML = Sizzle.isXML = function( elem ) {
+	var documentElement = elem && (elem.ownerDocument || elem).documentElement;
+	return documentElement ? documentElement.nodeName !== "HTML" : false;
 };
 
-Sizzle.find = function(expr, context, isXML){
-	var set, match;
+/**
+ * Sets document-related variables once based on the current document
+ * @param {Element|Object} [doc] An element or document object to use to set the document
+ * @returns {Object} Returns the current document
+ */
+setDocument = Sizzle.setDocument = function( node ) {
+	var hasCompare,
+		doc = node ? node.ownerDocument || node : preferredDoc,
+		parent = doc.defaultView;
 
-	if ( !expr ) {
-		return [];
+	if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
+		return document;
 	}
 
-	for ( var i = 0, l = Expr.order.length; i < l; i++ ) {
-		var type = Expr.order[i], match;
+	document = doc;
+	docElem = doc.documentElement;
 
-		if ( (match = Expr.leftMatch[ type ].exec( expr )) ) {
-			var left = match[1];
-			match.splice(1,1);
+	documentIsHTML = !isXML( doc );
 
-			if ( left.substr( left.length - 1 ) !== "\\" ) {
-				match[1] = (match[1] || "").replace(/\\/g, "");
-				set = Expr.find[ type ]( match, context, isXML );
-				if ( set != null ) {
-					expr = expr.replace( Expr.match[ type ], "" );
-					break;
-				}
-			}
+	if ( parent && parent !== parent.top ) {
+		if ( parent.addEventListener ) {
+			parent.addEventListener( "unload", function() {
+				setDocument();
+			}, false );
+		} else if ( parent.attachEvent ) {
+			parent.attachEvent( "onunload", function() {
+				setDocument();
+			});
 		}
 	}
 
-	if ( !set ) {
-		set = context.getElementsByTagName("*");
-	}
+	/* Attributes
+	---------------------------------------------------------------------- */
 
-	return {set: set, expr: expr};
-};
+	support.attributes = assert(function( div ) {
+		div.className = "i";
+		return !div.getAttribute("className");
+	});
 
-Sizzle.filter = function(expr, set, inplace, not){
-	var old = expr, result = [], curLoop = set, match, anyFound,
-		isXMLFilter = set && set[0] && isXML(set[0]);
+	/* getElement(s)By*
+	---------------------------------------------------------------------- */
 
-	while ( expr && set.length ) {
-		for ( var type in Expr.filter ) {
-			if ( (match = Expr.match[ type ].exec( expr )) != null ) {
-				var filter = Expr.filter[ type ], found, item;
-				anyFound = false;
+	support.getElementsByTagName = assert(function( div ) {
+		div.appendChild( doc.createComment("") );
+		return !div.getElementsByTagName("*").length;
+	});
 
-				if ( curLoop == result ) {
-					result = [];
-				}
+	support.getElementsByClassName = rnative.test( doc.getElementsByClassName ) && assert(function( div ) {
+		div.innerHTML = "<div class='a'></div><div class='a i'></div>";
 
-				if ( Expr.preFilter[ type ] ) {
-					match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not, isXMLFilter );
+		div.firstChild.className = "i";
+		return div.getElementsByClassName("i").length === 2;
+	});
 
-					if ( !match ) {
-						anyFound = found = true;
-					} else if ( match === true ) {
-						continue;
-					}
-				}
+	support.getById = assert(function( div ) {
+		docElem.appendChild( div ).id = expando;
+		return !doc.getElementsByName || !doc.getElementsByName( expando ).length;
+	});
 
-				if ( match ) {
-					for ( var i = 0; (item = curLoop[i]) != null; i++ ) {
-						if ( item ) {
-							found = filter( item, match, i, curLoop );
-							var pass = not ^ !!found;
-
-							if ( inplace && found != null ) {
-								if ( pass ) {
-									anyFound = true;
-								} else {
-									curLoop[i] = false;
-								}
-							} else if ( pass ) {
-								result.push( item );
-								anyFound = true;
-							}
-						}
+	if ( support.getById ) {
+		Expr.find["ID"] = function( id, context ) {
+			if ( typeof context.getElementById !== strundefined && documentIsHTML ) {
+				var m = context.getElementById( id );
+				return m && m.parentNode ? [m] : [];
+			}
+		};
+		Expr.filter["ID"] = function( id ) {
+			var attrId = id.replace( runescape, funescape );
+			return function( elem ) {
+				return elem.getAttribute("id") === attrId;
+			};
+		};
+	} else {
+		delete Expr.find["ID"];
+
+		Expr.filter["ID"] =  function( id ) {
+			var attrId = id.replace( runescape, funescape );
+			return function( elem ) {
+				var node = typeof elem.getAttributeNode !== strundefined && elem.getAttributeNode("id");
+				return node && node.value === attrId;
+			};
+		};
+	}
+
+	Expr.find["TAG"] = support.getElementsByTagName ?
+		function( tag, context ) {
+			if ( typeof context.getElementsByTagName !== strundefined ) {
+				return context.getElementsByTagName( tag );
+			}
+		} :
+		function( tag, context ) {
+			var elem,
+				tmp = [],
+				i = 0,
+				results = context.getElementsByTagName( tag );
+
+			if ( tag === "*" ) {
+				while ( (elem = results[i++]) ) {
+					if ( elem.nodeType === 1 ) {
+						tmp.push( elem );
 					}
 				}
 
-				if ( found !== undefined ) {
-					if ( !inplace ) {
-						curLoop = result;
-					}
+				return tmp;
+			}
+			return results;
+		};
 
-					expr = expr.replace( Expr.match[ type ], "" );
+	Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
+		if ( typeof context.getElementsByClassName !== strundefined && documentIsHTML ) {
+			return context.getElementsByClassName( className );
+		}
+	};
 
-					if ( !anyFound ) {
-						return [];
-					}
+	/* QSA/matchesSelector
+	---------------------------------------------------------------------- */
 
-					break;
+
+	rbuggyMatches = [];
+
+	rbuggyQSA = [];
+
+	if ( (support.qsa = rnative.test( doc.querySelectorAll )) ) {
+		assert(function( div ) {
+			div.innerHTML = "<select t=''><option selected=''></option></select>";
+
+			if ( div.querySelectorAll("[t^='']").length ) {
+				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
+			}
+
+			if ( !div.querySelectorAll("[selected]").length ) {
+				rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
+			}
+
+			if ( !div.querySelectorAll(":checked").length ) {
+				rbuggyQSA.push(":checked");
+			}
+		});
+
+		assert(function( div ) {
+			var input = doc.createElement("input");
+			input.setAttribute( "type", "hidden" );
+			div.appendChild( input ).setAttribute( "name", "D" );
+
+			if ( div.querySelectorAll("[name=d]").length ) {
+				rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
+			}
+
+			if ( !div.querySelectorAll(":enabled").length ) {
+				rbuggyQSA.push( ":enabled", ":disabled" );
+			}
+
+			div.querySelectorAll("*,:x");
+			rbuggyQSA.push(",.*:");
+		});
+	}
+
+	if ( (support.matchesSelector = rnative.test( (matches = docElem.webkitMatchesSelector ||
+		docElem.mozMatchesSelector ||
+		docElem.oMatchesSelector ||
+		docElem.msMatchesSelector) )) ) {
+
+		assert(function( div ) {
+			support.disconnectedMatch = matches.call( div, "div" );
+
+			matches.call( div, "[s!='']:x" );
+			rbuggyMatches.push( "!=", pseudos );
+		});
+	}
+
+	rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
+	rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );
+
+	/* Contains
+	---------------------------------------------------------------------- */
+	hasCompare = rnative.test( docElem.compareDocumentPosition );
+
+	contains = hasCompare || rnative.test( docElem.contains ) ?
+		function( a, b ) {
+			var adown = a.nodeType === 9 ? a.documentElement : a,
+				bup = b && b.parentNode;
+			return a === bup || !!( bup && bup.nodeType === 1 && (
+				adown.contains ?
+					adown.contains( bup ) :
+					a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
+			));
+		} :
+		function( a, b ) {
+			if ( b ) {
+				while ( (b = b.parentNode) ) {
+					if ( b === a ) {
+						return true;
+					}
 				}
 			}
+			return false;
+		};
+
+	/* Sorting
+	---------------------------------------------------------------------- */
+
+	sortOrder = hasCompare ?
+	function( a, b ) {
+
+		if ( a === b ) {
+			hasDuplicate = true;
+			return 0;
 		}
 
-		if ( expr == old ) {
-			if ( anyFound == null ) {
-				throw "Syntax error, unrecognized expression: " + expr;
-			} else {
-				break;
+		var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
+		if ( compare ) {
+			return compare;
+		}
+
+		compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
+			a.compareDocumentPosition( b ) :
+
+			1;
+
+		if ( compare & 1 ||
+			(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {
+
+			if ( a === doc || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
+				return -1;
 			}
+			if ( b === doc || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
+				return 1;
+			}
+
+			return sortInput ?
+				( indexOf.call( sortInput, a ) - indexOf.call( sortInput, b ) ) :
+				0;
+		}
+
+		return compare & 4 ? -1 : 1;
+	} :
+	function( a, b ) {
+		if ( a === b ) {
+			hasDuplicate = true;
+			return 0;
+		}
+
+		var cur,
+			i = 0,
+			aup = a.parentNode,
+			bup = b.parentNode,
+			ap = [ a ],
+			bp = [ b ];
+
+		if ( !aup || !bup ) {
+			return a === doc ? -1 :
+				b === doc ? 1 :
+				aup ? -1 :
+				bup ? 1 :
+				sortInput ?
+				( indexOf.call( sortInput, a ) - indexOf.call( sortInput, b ) ) :
+				0;
+
+		} else if ( aup === bup ) {
+			return siblingCheck( a, b );
 		}
 
-		old = expr;
+		cur = a;
+		while ( (cur = cur.parentNode) ) {
+			ap.unshift( cur );
+		}
+		cur = b;
+		while ( (cur = cur.parentNode) ) {
+			bp.unshift( cur );
+		}
+
+		while ( ap[i] === bp[i] ) {
+			i++;
+		}
+
+		return i ?
+			siblingCheck( ap[i], bp[i] ) :
+
+			ap[i] === preferredDoc ? -1 :
+			bp[i] === preferredDoc ? 1 :
+			0;
+	};
+
+	return doc;
+};
+
+Sizzle.matches = function( expr, elements ) {
+	return Sizzle( expr, null, null, elements );
+};
+
+Sizzle.matchesSelector = function( elem, expr ) {
+	if ( ( elem.ownerDocument || elem ) !== document ) {
+		setDocument( elem );
+	}
+
+	expr = expr.replace( rattributeQuotes, "='$1']" );
+
+	if ( support.matchesSelector && documentIsHTML &&
+		( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
+		( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {
+
+		try {
+			var ret = matches.call( elem, expr );
+
+			if ( ret || support.disconnectedMatch ||
+					elem.document && elem.document.nodeType !== 11 ) {
+				return ret;
+			}
+		} catch(e) {}
 	}
 
-	return curLoop;
+	return Sizzle( expr, document, null, [elem] ).length > 0;
 };
 
-var Expr = Sizzle.selectors = {
-	order: [ "ID", "NAME", "TAG" ],
-	match: {
-		ID: /#((?:[\w\u00c0-\uFFFF-]|\\.)+)/,
-		CLASS: /\.((?:[\w\u00c0-\uFFFF-]|\\.)+)/,
-		NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF-]|\\.)+)['"]*\]/,
-		ATTR: /\[\s*((?:[\w\u00c0-\uFFFF-]|\\.)+)\s*(?:(\S?=)\s*(['"]*)(.*?)\3|)\s*\]/,
-		TAG: /^((?:[\w\u00c0-\uFFFF\*-]|\\.)+)/,
-		CHILD: /:(only|nth|last|first)-child(?:\((even|odd|[\dn+-]*)\))?/,
-		POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^-]|$)/,
-		PSEUDO: /:((?:[\w\u00c0-\uFFFF-]|\\.)+)(?:\((['"]*)((?:\([^\)]+\)|[^\2\(\)]*)+)\2\))?/
-	},
-	leftMatch: {},
-	attrMap: {
-		"class": "className",
-		"for": "htmlFor"
-	},
-	attrHandle: {
-		href: function(elem){
-			return elem.getAttribute("href");
-		}
-	},
-	relative: {
-		"+": function(checkSet, part, isXML){
-			var isPartStr = typeof part === "string",
-				isTag = isPartStr && !/\W/.test(part),
-				isPartStrNotTag = isPartStr && !isTag;
+Sizzle.contains = function( context, elem ) {
+	if ( ( context.ownerDocument || context ) !== document ) {
+		setDocument( context );
+	}
+	return contains( context, elem );
+};
+
+Sizzle.attr = function( elem, name ) {
+	if ( ( elem.ownerDocument || elem ) !== document ) {
+		setDocument( elem );
+	}
+
+	var fn = Expr.attrHandle[ name.toLowerCase() ],
+		val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
+			fn( elem, name, !documentIsHTML ) :
+			undefined;
+
+	return val !== undefined ?
+		val :
+		support.attributes || !documentIsHTML ?
+			elem.getAttribute( name ) :
+			(val = elem.getAttributeNode(name)) && val.specified ?
+				val.value :
+				null;
+};
+
+Sizzle.error = function( msg ) {
+	throw new Error( "Syntax error, unrecognized expression: " + msg );
+};
 
-			if ( isTag && !isXML ) {
-				part = part.toUpperCase();
+/**
+ * Document sorting and removing duplicates
+ * @param {ArrayLike} results
+ */
+Sizzle.uniqueSort = function( results ) {
+	var elem,
+		duplicates = [],
+		j = 0,
+		i = 0;
+
+	hasDuplicate = !support.detectDuplicates;
+	sortInput = !support.sortStable && results.slice( 0 );
+	results.sort( sortOrder );
+
+	if ( hasDuplicate ) {
+		while ( (elem = results[i++]) ) {
+			if ( elem === results[ i ] ) {
+				j = duplicates.push( i );
 			}
+		}
+		while ( j-- ) {
+			results.splice( duplicates[ j ], 1 );
+		}
+	}
 
-			for ( var i = 0, l = checkSet.length, elem; i < l; i++ ) {
-				if ( (elem = checkSet[i]) ) {
-					while ( (elem = elem.previousSibling) && elem.nodeType !== 1 ) {}
+	sortInput = null;
 
-					checkSet[i] = isPartStrNotTag || elem && elem.nodeName === part ?
-						elem || false :
-						elem === part;
-				}
+	return results;
+};
+
+/**
+ * Utility function for retrieving the text value of an array of DOM nodes
+ * @param {Array|Element} elem
+ */
+getText = Sizzle.getText = function( elem ) {
+	var node,
+		ret = "",
+		i = 0,
+		nodeType = elem.nodeType;
+
+	if ( !nodeType ) {
+		while ( (node = elem[i++]) ) {
+			ret += getText( node );
+		}
+	} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
+		if ( typeof elem.textContent === "string" ) {
+			return elem.textContent;
+		} else {
+			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
+				ret += getText( elem );
 			}
+		}
+	} else if ( nodeType === 3 || nodeType === 4 ) {
+		return elem.nodeValue;
+	}
 
-			if ( isPartStrNotTag ) {
-				Sizzle.filter( part, checkSet, true );
+	return ret;
+};
+
+Expr = Sizzle.selectors = {
+
+	cacheLength: 50,
+
+	createPseudo: markFunction,
+
+	match: matchExpr,
+
+	attrHandle: {},
+
+	find: {},
+
+	relative: {
+		">": { dir: "parentNode", first: true },
+		" ": { dir: "parentNode" },
+		"+": { dir: "previousSibling", first: true },
+		"~": { dir: "previousSibling" }
+	},
+
+	preFilter: {
+		"ATTR": function( match ) {
+			match[1] = match[1].replace( runescape, funescape );
+
+			match[3] = ( match[4] || match[5] || "" ).replace( runescape, funescape );
+
+			if ( match[2] === "~=" ) {
+				match[3] = " " + match[3] + " ";
 			}
-		},
-		">": function(checkSet, part, isXML){
-			var isPartStr = typeof part === "string";
 
-			if ( isPartStr && !/\W/.test(part) ) {
-				part = isXML ? part : part.toUpperCase();
+			return match.slice( 0, 4 );
+		},
 
-				for ( var i = 0, l = checkSet.length; i < l; i++ ) {
-					var elem = checkSet[i];
-					if ( elem ) {
-						var parent = elem.parentNode;
-						checkSet[i] = parent.nodeName === part ? parent : false;
-					}
-				}
-			} else {
-				for ( var i = 0, l = checkSet.length; i < l; i++ ) {
-					var elem = checkSet[i];
-					if ( elem ) {
-						checkSet[i] = isPartStr ?
-							elem.parentNode :
-							elem.parentNode === part;
-					}
+		"CHILD": function( match ) {
+			/* matches from matchExpr["CHILD"]
+				1 type (only|nth|...)
+				2 what (child|of-type)
+				3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
+				4 xn-component of xn+y argument ([+-]?\d*n|)
+				5 sign of xn-component
+				6 x of xn-component
+				7 sign of y-component
+				8 y of y-component
+			*/
+			match[1] = match[1].toLowerCase();
+
+			if ( match[1].slice( 0, 3 ) === "nth" ) {
+				if ( !match[3] ) {
+					Sizzle.error( match[0] );
 				}
 
-				if ( isPartStr ) {
-					Sizzle.filter( part, checkSet, true );
-				}
+				match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
+				match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );
+
+			} else if ( match[3] ) {
+				Sizzle.error( match[0] );
 			}
+
+			return match;
 		},
-		"": function(checkSet, part, isXML){
-			var doneName = done++, checkFn = dirCheck;
 
-			if ( !/\W/.test(part) ) {
-				var nodeCheck = part = isXML ? part : part.toUpperCase();
-				checkFn = dirNodeCheck;
+		"PSEUDO": function( match ) {
+			var excess,
+				unquoted = !match[5] && match[2];
+
+			if ( matchExpr["CHILD"].test( match[0] ) ) {
+				return null;
 			}
 
-			checkFn("parentNode", part, doneName, checkSet, nodeCheck, isXML);
-		},
-		"~": function(checkSet, part, isXML){
-			var doneName = done++, checkFn = dirCheck;
+			if ( match[3] && match[4] !== undefined ) {
+				match[2] = match[4];
 
-			if ( typeof part === "string" && !/\W/.test(part) ) {
-				var nodeCheck = part = isXML ? part : part.toUpperCase();
-				checkFn = dirNodeCheck;
+			} else if ( unquoted && rpseudo.test( unquoted ) &&
+				(excess = tokenize( unquoted, true )) &&
+				(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
+
+				match[0] = match[0].slice( 0, excess );
+				match[2] = unquoted.slice( 0, excess );
 			}
 
-			checkFn("previousSibling", part, doneName, checkSet, nodeCheck, isXML);
+			return match.slice( 0, 3 );
 		}
 	},
-	find: {
-		ID: function(match, context, isXML){
-			if ( typeof context.getElementById !== "undefined" && !isXML ) {
-				var m = context.getElementById(match[1]);
-				return m ? [m] : [];
-			}
+
+	filter: {
+
+		"TAG": function( nodeNameSelector ) {
+			var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
+			return nodeNameSelector === "*" ?
+				function() { return true; } :
+				function( elem ) {
+					return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
+				};
 		},
-		NAME: function(match, context, isXML){
-			if ( typeof context.getElementsByName !== "undefined" ) {
-				var ret = [], results = context.getElementsByName(match[1]);
 
-				for ( var i = 0, l = results.length; i < l; i++ ) {
-					if ( results[i].getAttribute("name") === match[1] ) {
-						ret.push( results[i] );
-					}
-				}
+		"CLASS": function( className ) {
+			var pattern = classCache[ className + " " ];
 
-				return ret.length === 0 ? null : ret;
-			}
+			return pattern ||
+				(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
+				classCache( className, function( elem ) {
+					return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== strundefined && elem.getAttribute("class") || "" );
+				});
 		},
-		TAG: function(match, context){
-			return context.getElementsByTagName(match[1]);
-		}
-	},
-	preFilter: {
-		CLASS: function(match, curLoop, inplace, result, not, isXML){
-			match = " " + match[1].replace(/\\/g, "") + " ";
 
-			if ( isXML ) {
-				return match;
-			}
+		"ATTR": function( name, operator, check ) {
+			return function( elem ) {
+				var result = Sizzle.attr( elem, name );
 
-			for ( var i = 0, elem; (elem = curLoop[i]) != null; i++ ) {
-				if ( elem ) {
-					if ( not ^ (elem.className && (" " + elem.className + " ").indexOf(match) >= 0) ) {
-						if ( !inplace )
-							result.push( elem );
-					} else if ( inplace ) {
-						curLoop[i] = false;
-					}
+				if ( result == null ) {
+					return operator === "!=";
+				}
+				if ( !operator ) {
+					return true;
 				}
-			}
 
-			return false;
+				result += "";
+
+				return operator === "=" ? result === check :
+					operator === "!=" ? result !== check :
+					operator === "^=" ? check && result.indexOf( check ) === 0 :
+					operator === "*=" ? check && result.indexOf( check ) > -1 :
+					operator === "$=" ? check && result.slice( -check.length ) === check :
+					operator === "~=" ? ( " " + result + " " ).indexOf( check ) > -1 :
+					operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
+					false;
+			};
 		},
-		ID: function(match){
-			return match[1].replace(/\\/g, "");
-		},
-		TAG: function(match, curLoop){
-			for ( var i = 0; curLoop[i] === false; i++ ){}
-			return curLoop[i] && isXML(curLoop[i]) ? match[1] : match[1].toUpperCase();
-		},
-		CHILD: function(match){
-			if ( match[1] == "nth" ) {
-				var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
-					match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||
-					!/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);
-
-				match[2] = (test[1] + (test[2] || 1)) - 0;
-				match[3] = test[3] - 0;
-			}
 
-			match[0] = done++;
+		"CHILD": function( type, what, argument, first, last ) {
+			var simple = type.slice( 0, 3 ) !== "nth",
+				forward = type.slice( -4 ) !== "last",
+				ofType = what === "of-type";
+
+			return first === 1 && last === 0 ?
+
+				function( elem ) {
+					return !!elem.parentNode;
+				} :
+
+				function( elem, context, xml ) {
+					var cache, outerCache, node, diff, nodeIndex, start,
+						dir = simple !== forward ? "nextSibling" : "previousSibling",
+						parent = elem.parentNode,
+						name = ofType && elem.nodeName.toLowerCase(),
+						useCache = !xml && !ofType;
+
+					if ( parent ) {
+
+						if ( simple ) {
+							while ( dir ) {
+								node = elem;
+								while ( (node = node[ dir ]) ) {
+									if ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) {
+										return false;
+									}
+								}
+								start = dir = type === "only" && !start && "nextSibling";
+							}
+							return true;
+						}
 
-			return match;
+						start = [ forward ? parent.firstChild : parent.lastChild ];
+
+						if ( forward && useCache ) {
+							outerCache = parent[ expando ] || (parent[ expando ] = {});
+							cache = outerCache[ type ] || [];
+							nodeIndex = cache[0] === dirruns && cache[1];
+							diff = cache[0] === dirruns && cache[2];
+							node = nodeIndex && parent.childNodes[ nodeIndex ];
+
+							while ( (node = ++nodeIndex && node && node[ dir ] ||
+
+								(diff = nodeIndex = 0) || start.pop()) ) {
+
+								if ( node.nodeType === 1 && ++diff && node === elem ) {
+									outerCache[ type ] = [ dirruns, nodeIndex, diff ];
+									break;
+								}
+							}
+
+						} else if ( useCache && (cache = (elem[ expando ] || (elem[ expando ] = {}))[ type ]) && cache[0] === dirruns ) {
+							diff = cache[1];
+
+						} else {
+							while ( (node = ++nodeIndex && node && node[ dir ] ||
+								(diff = nodeIndex = 0) || start.pop()) ) {
+
+								if ( ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) && ++diff ) {
+									if ( useCache ) {
+										(node[ expando ] || (node[ expando ] = {}))[ type ] = [ dirruns, diff ];
+									}
+
+									if ( node === elem ) {
+										break;
+									}
+								}
+							}
+						}
+
+						diff -= last;
+						return diff === first || ( diff % first === 0 && diff / first >= 0 );
+					}
+				};
 		},
-		ATTR: function(match, curLoop, inplace, result, not, isXML){
-			var name = match[1].replace(/\\/g, "");
 
-			if ( !isXML && Expr.attrMap[name] ) {
-				match[1] = Expr.attrMap[name];
-			}
+		"PSEUDO": function( pseudo, argument ) {
+			var args,
+				fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
+					Sizzle.error( "unsupported pseudo: " + pseudo );
 
-			if ( match[2] === "~=" ) {
-				match[4] = " " + match[4] + " ";
+			if ( fn[ expando ] ) {
+				return fn( argument );
 			}
 
-			return match;
-		},
-		PSEUDO: function(match, curLoop, inplace, result, not){
-			if ( match[1] === "not" ) {
-				if ( ( chunker.exec(match[3]) || "" ).length > 1 || /^\w/.test(match[3]) ) {
-					match[3] = Sizzle(match[3], null, null, curLoop);
-				} else {
-					var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);
-					if ( !inplace ) {
-						result.push.apply( result, ret );
-					}
-					return false;
-				}
-			} else if ( Expr.match.POS.test( match[0] ) || Expr.match.CHILD.test( match[0] ) ) {
-				return true;
+			if ( fn.length > 1 ) {
+				args = [ pseudo, pseudo, "", argument ];
+				return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
+					markFunction(function( seed, matches ) {
+						var idx,
+							matched = fn( seed, argument ),
+							i = matched.length;
+						while ( i-- ) {
+							idx = indexOf.call( seed, matched[i] );
+							seed[ idx ] = !( matches[ idx ] = matched[i] );
+						}
+					}) :
+					function( elem ) {
+						return fn( elem, 0, args );
+					};
 			}
 
-			return match;
-		},
-		POS: function(match){
-			match.unshift( true );
-			return match;
+			return fn;
 		}
 	},
-	filters: {
-		enabled: function(elem){
-			return elem.disabled === false && elem.type !== "hidden";
-		},
-		disabled: function(elem){
-			return elem.disabled === true;
-		},
-		checked: function(elem){
-			return elem.checked === true;
-		},
-		selected: function(elem){
-			elem.parentNode.selectedIndex;
-			return elem.selected === true;
-		},
-		parent: function(elem){
-			return !!elem.firstChild;
-		},
-		empty: function(elem){
-			return !elem.firstChild;
-		},
-		has: function(elem, i, match){
-			return !!Sizzle( match[3], elem ).length;
-		},
-		header: function(elem){
-			return /h\d/i.test( elem.nodeName );
-		},
-		text: function(elem){
-			return "text" === elem.type;
-		},
-		radio: function(elem){
-			return "radio" === elem.type;
-		},
-		checkbox: function(elem){
-			return "checkbox" === elem.type;
-		},
-		file: function(elem){
-			return "file" === elem.type;
-		},
-		password: function(elem){
-			return "password" === elem.type;
+
+	pseudos: {
+		"not": markFunction(function( selector ) {
+			var input = [],
+				results = [],
+				matcher = compile( selector.replace( rtrim, "$1" ) );
+
+			return matcher[ expando ] ?
+				markFunction(function( seed, matches, context, xml ) {
+					var elem,
+						unmatched = matcher( seed, null, xml, [] ),
+						i = seed.length;
+
+					while ( i-- ) {
+						if ( (elem = unmatched[i]) ) {
+							seed[i] = !(matches[i] = elem);
+						}
+					}
+				}) :
+				function( elem, context, xml ) {
+					input[0] = elem;
+					matcher( input, null, xml, results );
+					return !results.pop();
+				};
+		}),
+
+		"has": markFunction(function( selector ) {
+			return function( elem ) {
+				return Sizzle( selector, elem ).length > 0;
+			};
+		}),
+
+		"contains": markFunction(function( text ) {
+			return function( elem ) {
+				return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
+			};
+		}),
+
+		"lang": markFunction( function( lang ) {
+			if ( !ridentifier.test(lang || "") ) {
+				Sizzle.error( "unsupported lang: " + lang );
+			}
+			lang = lang.replace( runescape, funescape ).toLowerCase();
+			return function( elem ) {
+				var elemLang;
+				do {
+					if ( (elemLang = documentIsHTML ?
+						elem.lang :
+						elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {
+
+						elemLang = elemLang.toLowerCase();
+						return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
+					}
+				} while ( (elem = elem.parentNode) && elem.nodeType === 1 );
+				return false;
+			};
+		}),
+
+		"target": function( elem ) {
+			var hash = window.location && window.location.hash;
+			return hash && hash.slice( 1 ) === elem.id;
 		},
-		submit: function(elem){
-			return "submit" === elem.type;
+
+		"root": function( elem ) {
+			return elem === docElem;
 		},
-		image: function(elem){
-			return "image" === elem.type;
+
+		"focus": function( elem ) {
+			return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
 		},
-		reset: function(elem){
-			return "reset" === elem.type;
+
+		"enabled": function( elem ) {
+			return elem.disabled === false;
 		},
-		button: function(elem){
-			return "button" === elem.type || elem.nodeName.toUpperCase() === "BUTTON";
+
+		"disabled": function( elem ) {
+			return elem.disabled === true;
 		},
-		input: function(elem){
-			return /input|select|textarea|button/i.test(elem.nodeName);
-		}
-	},
-	setFilters: {
-		first: function(elem, i){
-			return i === 0;
+
+		"checked": function( elem ) {
+			var nodeName = elem.nodeName.toLowerCase();
+			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
 		},
-		last: function(elem, i, match, array){
-			return i === array.length - 1;
+
+		"selected": function( elem ) {
+			if ( elem.parentNode ) {
+				elem.parentNode.selectedIndex;
+			}
+
+			return elem.selected === true;
 		},
-		even: function(elem, i){
-			return i % 2 === 0;
+
+		"empty": function( elem ) {
+			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
+				if ( elem.nodeType < 6 ) {
+					return false;
+				}
+			}
+			return true;
 		},
-		odd: function(elem, i){
-			return i % 2 === 1;
+
+		"parent": function( elem ) {
+			return !Expr.pseudos["empty"]( elem );
 		},
-		lt: function(elem, i, match){
-			return i < match[3] - 0;
+
+		"header": function( elem ) {
+			return rheader.test( elem.nodeName );
 		},
-		gt: function(elem, i, match){
-			return i > match[3] - 0;
+
+		"input": function( elem ) {
+			return rinputs.test( elem.nodeName );
 		},
-		nth: function(elem, i, match){
-			return match[3] - 0 == i;
+
+		"button": function( elem ) {
+			var name = elem.nodeName.toLowerCase();
+			return name === "input" && elem.type === "button" || name === "button";
 		},
-		eq: function(elem, i, match){
-			return match[3] - 0 == i;
-		}
-	},
-	filter: {
-		PSEUDO: function(elem, match, i, array){
-			var name = match[1], filter = Expr.filters[ name ];
-
-			if ( filter ) {
-				return filter( elem, i, match, array );
-			} else if ( name === "contains" ) {
-				return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
-			} else if ( name === "not" ) {
-				var not = match[3];
-
-				for ( var i = 0, l = not.length; i < l; i++ ) {
-					if ( not[i] === elem ) {
-						return false;
-					}
-				}
 
-				return true;
-			}
+		"text": function( elem ) {
+			var attr;
+			return elem.nodeName.toLowerCase() === "input" &&
+				elem.type === "text" &&
+
+				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
 		},
-		CHILD: function(elem, match){
-			var type = match[1], node = elem;
-			switch (type) {
-				case 'only':
-				case 'first':
-					while ( (node = node.previousSibling) )  {
-						if ( node.nodeType === 1 ) return false;
-					}
-					if ( type == 'first') return true;
-					node = elem;
-				case 'last':
-					while ( (node = node.nextSibling) )  {
-						if ( node.nodeType === 1 ) return false;
-					}
-					return true;
-				case 'nth':
-					var first = match[2], last = match[3];
 
-					if ( first == 1 && last == 0 ) {
-						return true;
-					}
+		"first": createPositionalPseudo(function() {
+			return [ 0 ];
+		}),
 
-					var doneName = match[0],
-						parent = elem.parentNode;
+		"last": createPositionalPseudo(function( matchIndexes, length ) {
+			return [ length - 1 ];
+		}),
 
-					if ( parent && (parent.sizcache !== doneName || !elem.nodeIndex) ) {
-						var count = 0;
-						for ( node = parent.firstChild; node; node = node.nextSibling ) {
-							if ( node.nodeType === 1 ) {
-								node.nodeIndex = ++count;
-							}
-						}
-						parent.sizcache = doneName;
-					}
+		"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			return [ argument < 0 ? argument + length : argument ];
+		}),
 
-					var diff = elem.nodeIndex - last;
-					if ( first == 0 ) {
-						return diff == 0;
-					} else {
-						return ( diff % first == 0 && diff / first >= 0 );
-					}
+		"even": createPositionalPseudo(function( matchIndexes, length ) {
+			var i = 0;
+			for ( ; i < length; i += 2 ) {
+				matchIndexes.push( i );
 			}
-		},
-		ID: function(elem, match){
-			return elem.nodeType === 1 && elem.getAttribute("id") === match;
-		},
-		TAG: function(elem, match){
-			return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;
-		},
-		CLASS: function(elem, match){
-			return (" " + (elem.className || elem.getAttribute("class")) + " ")
-				.indexOf( match ) > -1;
-		},
-		ATTR: function(elem, match){
-			var name = match[1],
-				result = Expr.attrHandle[ name ] ?
-					Expr.attrHandle[ name ]( elem ) :
-					elem[ name ] != null ?
-						elem[ name ] :
-						elem.getAttribute( name ),
-				value = result + "",
-				type = match[2],
-				check = match[4];
-
-			return result == null ?
-				type === "!=" :
-				type === "=" ?
-				value === check :
-				type === "*=" ?
-				value.indexOf(check) >= 0 :
-				type === "~=" ?
-				(" " + value + " ").indexOf(check) >= 0 :
-				!check ?
-				value && result !== false :
-				type === "!=" ?
-				value != check :
-				type === "^=" ?
-				value.indexOf(check) === 0 :
-				type === "$=" ?
-				value.substr(value.length - check.length) === check :
-				type === "|=" ?
-				value === check || value.substr(0, check.length + 1) === check + "-" :
-				false;
-		},
-		POS: function(elem, match, i, array){
-			var name = match[2], filter = Expr.setFilters[ name ];
+			return matchIndexes;
+		}),
 
-			if ( filter ) {
-				return filter( elem, i, match, array );
+		"odd": createPositionalPseudo(function( matchIndexes, length ) {
+			var i = 1;
+			for ( ; i < length; i += 2 ) {
+				matchIndexes.push( i );
 			}
-		}
+			return matchIndexes;
+		}),
+
+		"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			var i = argument < 0 ? argument + length : argument;
+			for ( ; --i >= 0; ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		}),
+
+		"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			var i = argument < 0 ? argument + length : argument;
+			for ( ; ++i < length; ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		})
 	}
 };
 
-var origPOS = Expr.match.POS;
+Expr.pseudos["nth"] = Expr.pseudos["eq"];
 
-for ( var type in Expr.match ) {
-	Expr.match[ type ] = new RegExp( Expr.match[ type ].source + /(?![^\[]*\])(?![^\(]*\))/.source );
-	Expr.leftMatch[ type ] = new RegExp( /(^(?:.|\r|\n)*?)/.source + Expr.match[ type ].source );
+for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
+	Expr.pseudos[ i ] = createInputPseudo( i );
+}
+for ( i in { submit: true, reset: true } ) {
+	Expr.pseudos[ i ] = createButtonPseudo( i );
 }
 
-var makeArray = function(array, results) {
-	array = Array.prototype.slice.call( array, 0 );
+function setFilters() {}
+setFilters.prototype = Expr.filters = Expr.pseudos;
+Expr.setFilters = new setFilters();
 
-	if ( results ) {
-		results.push.apply( results, array );
-		return results;
-	}
+function tokenize( selector, parseOnly ) {
+	var matched, match, tokens, type,
+		soFar, groups, preFilters,
+		cached = tokenCache[ selector + " " ];
 
-	return array;
-};
+	if ( cached ) {
+		return parseOnly ? 0 : cached.slice( 0 );
+	}
 
-try {
-	Array.prototype.slice.call( document.documentElement.childNodes, 0 );
+	soFar = selector;
+	groups = [];
+	preFilters = Expr.preFilter;
 
-} catch(e){
-	makeArray = function(array, results) {
-		var ret = results || [];
+	while ( soFar ) {
 
-		if ( toString.call(array) === "[object Array]" ) {
-			Array.prototype.push.apply( ret, array );
-		} else {
-			if ( typeof array.length === "number" ) {
-				for ( var i = 0, l = array.length; i < l; i++ ) {
-					ret.push( array[i] );
-				}
-			} else {
-				for ( var i = 0; array[i]; i++ ) {
-					ret.push( array[i] );
-				}
+		if ( !matched || (match = rcomma.exec( soFar )) ) {
+			if ( match ) {
+				soFar = soFar.slice( match[0].length ) || soFar;
 			}
+			groups.push( (tokens = []) );
 		}
 
-		return ret;
-	};
-}
-
-var sortOrder;
+		matched = false;
 
-if ( document.documentElement.compareDocumentPosition ) {
-	sortOrder = function( a, b ) {
-		if ( !a.compareDocumentPosition || !b.compareDocumentPosition ) {
-			if ( a == b ) {
-				hasDuplicate = true;
-			}
-			return 0;
+		if ( (match = rcombinators.exec( soFar )) ) {
+			matched = match.shift();
+			tokens.push({
+				value: matched,
+				type: match[0].replace( rtrim, " " )
+			});
+			soFar = soFar.slice( matched.length );
 		}
 
-		var ret = a.compareDocumentPosition(b) & 4 ? -1 : a === b ? 0 : 1;
-		if ( ret === 0 ) {
-			hasDuplicate = true;
-		}
-		return ret;
-	};
-} else if ( "sourceIndex" in document.documentElement ) {
-	sortOrder = function( a, b ) {
-		if ( !a.sourceIndex || !b.sourceIndex ) {
-			if ( a == b ) {
-				hasDuplicate = true;
+		for ( type in Expr.filter ) {
+			if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
+				(match = preFilters[ type ]( match ))) ) {
+				matched = match.shift();
+				tokens.push({
+					value: matched,
+					type: type,
+					matches: match
+				});
+				soFar = soFar.slice( matched.length );
 			}
-			return 0;
 		}
 
-		var ret = a.sourceIndex - b.sourceIndex;
-		if ( ret === 0 ) {
-			hasDuplicate = true;
-		}
-		return ret;
-	};
-} else if ( document.createRange ) {
-	sortOrder = function( a, b ) {
-		if ( !a.ownerDocument || !b.ownerDocument ) {
-			if ( a == b ) {
-				hasDuplicate = true;
-			}
-			return 0;
+		if ( !matched ) {
+			break;
 		}
+	}
 
-		var aRange = a.ownerDocument.createRange(), bRange = b.ownerDocument.createRange();
-		aRange.setStart(a, 0);
-		aRange.setEnd(a, 0);
-		bRange.setStart(b, 0);
-		bRange.setEnd(b, 0);
-		var ret = aRange.compareBoundaryPoints(Range.START_TO_END, bRange);
-		if ( ret === 0 ) {
-			hasDuplicate = true;
-		}
-		return ret;
-	};
+	return parseOnly ?
+		soFar.length :
+		soFar ?
+			Sizzle.error( selector ) :
+			tokenCache( selector, groups ).slice( 0 );
 }
 
-(function(){
-	var form = document.createElement("div"),
-		id = "script" + (new Date).getTime();
-	form.innerHTML = "<a name='" + id + "'/>";
-
-	var root = document.documentElement;
-	root.insertBefore( form, root.firstChild );
-
-	if ( !!document.getElementById( id ) ) {
-		Expr.find.ID = function(match, context, isXML){
-			if ( typeof context.getElementById !== "undefined" && !isXML ) {
-				var m = context.getElementById(match[1]);
-				return m ? m.id === match[1] || typeof m.getAttributeNode !== "undefined" && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
-			}
-		};
-
-		Expr.filter.ID = function(elem, match){
-			var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
-			return elem.nodeType === 1 && node && node.nodeValue === match;
-		};
+function toSelector( tokens ) {
+	var i = 0,
+		len = tokens.length,
+		selector = "";
+	for ( ; i < len; i++ ) {
+		selector += tokens[i].value;
 	}
+	return selector;
+}
 
-	root.removeChild( form );
-	root = form = null; // release memory in IE
-})();
-
-(function(){
-
-	var div = document.createElement("div");
-	div.appendChild( document.createComment("") );
+function addCombinator( matcher, combinator, base ) {
+	var dir = combinator.dir,
+		checkNonElements = base && dir === "parentNode",
+		doneName = done++;
 
-	if ( div.getElementsByTagName("*").length > 0 ) {
-		Expr.find.TAG = function(match, context){
-			var results = context.getElementsByTagName(match[1]);
+	return combinator.first ?
+		function( elem, context, xml ) {
+			while ( (elem = elem[ dir ]) ) {
+				if ( elem.nodeType === 1 || checkNonElements ) {
+					return matcher( elem, context, xml );
+				}
+			}
+		} :
 
-			if ( match[1] === "*" ) {
-				var tmp = [];
+		function( elem, context, xml ) {
+			var oldCache, outerCache,
+				newCache = [ dirruns, doneName ];
 
-				for ( var i = 0; results[i]; i++ ) {
-					if ( results[i].nodeType === 1 ) {
-						tmp.push( results[i] );
+			if ( xml ) {
+				while ( (elem = elem[ dir ]) ) {
+					if ( elem.nodeType === 1 || checkNonElements ) {
+						if ( matcher( elem, context, xml ) ) {
+							return true;
+						}
+					}
+				}
+			} else {
+				while ( (elem = elem[ dir ]) ) {
+					if ( elem.nodeType === 1 || checkNonElements ) {
+						outerCache = elem[ expando ] || (elem[ expando ] = {});
+						if ( (oldCache = outerCache[ dir ]) &&
+							oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
+
+							return (newCache[ 2 ] = oldCache[ 2 ]);
+						} else {
+							outerCache[ dir ] = newCache;
+
+							if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
+								return true;
+							}
+						}
 					}
 				}
-
-				results = tmp;
 			}
-
-			return results;
-		};
-	}
-
-	div.innerHTML = "<a href='#'></a>";
-	if ( div.firstChild && typeof div.firstChild.getAttribute !== "undefined" &&
-			div.firstChild.getAttribute("href") !== "#" ) {
-		Expr.attrHandle.href = function(elem){
-			return elem.getAttribute("href", 2);
 		};
-	}
-
-	div = null; // release memory in IE
-})();
+}
 
-if ( document.querySelectorAll ) (function(){
-	var oldSizzle = Sizzle, div = document.createElement("div");
-	div.innerHTML = "<p class='TEST'></p>";
+function elementMatcher( matchers ) {
+	return matchers.length > 1 ?
+		function( elem, context, xml ) {
+			var i = matchers.length;
+			while ( i-- ) {
+				if ( !matchers[i]( elem, context, xml ) ) {
+					return false;
+				}
+			}
+			return true;
+		} :
+		matchers[0];
+}
 
-	if ( div.querySelectorAll && div.querySelectorAll(".TEST").length === 0 ) {
-		return;
+function multipleContexts( selector, contexts, results ) {
+	var i = 0,
+		len = contexts.length;
+	for ( ; i < len; i++ ) {
+		Sizzle( selector, contexts[i], results );
 	}
+	return results;
+}
 
-	Sizzle = function(query, context, extra, seed){
-		context = context || document;
-
-		if ( !seed && context.nodeType === 9 && !isXML(context) ) {
-			try {
-				return makeArray( context.querySelectorAll(query), extra );
-			} catch(e){}
+function condense( unmatched, map, filter, context, xml ) {
+	var elem,
+		newUnmatched = [],
+		i = 0,
+		len = unmatched.length,
+		mapped = map != null;
+
+	for ( ; i < len; i++ ) {
+		if ( (elem = unmatched[i]) ) {
+			if ( !filter || filter( elem, context, xml ) ) {
+				newUnmatched.push( elem );
+				if ( mapped ) {
+					map.push( i );
+				}
+			}
 		}
+	}
 
-		return oldSizzle(query, context, extra, seed);
-	};
+	return newUnmatched;
+}
 
-	for ( var prop in oldSizzle ) {
-		Sizzle[ prop ] = oldSizzle[ prop ];
+function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
+	if ( postFilter && !postFilter[ expando ] ) {
+		postFilter = setMatcher( postFilter );
+	}
+	if ( postFinder && !postFinder[ expando ] ) {
+		postFinder = setMatcher( postFinder, postSelector );
 	}
+	return markFunction(function( seed, results, context, xml ) {
+		var temp, i, elem,
+			preMap = [],
+			postMap = [],
+			preexisting = results.length,
 
-	div = null; // release memory in IE
-})();
+			elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),
 
-if ( document.getElementsByClassName && document.documentElement.getElementsByClassName ) (function(){
-	var div = document.createElement("div");
-	div.innerHTML = "<div class='test e'></div><div class='test'></div>";
+			matcherIn = preFilter && ( seed || !selector ) ?
+				condense( elems, preMap, preFilter, context, xml ) :
+				elems,
 
-	if ( div.getElementsByClassName("e").length === 0 )
-		return;
+			matcherOut = matcher ?
+				postFinder || ( seed ? preFilter : preexisting || postFilter ) ?
 
-	div.lastChild.className = "e";
+					[] :
 
-	if ( div.getElementsByClassName("e").length === 1 )
-		return;
+					results :
+				matcherIn;
 
-	Expr.order.splice(1, 0, "CLASS");
-	Expr.find.CLASS = function(match, context, isXML) {
-		if ( typeof context.getElementsByClassName !== "undefined" && !isXML ) {
-			return context.getElementsByClassName(match[1]);
+		if ( matcher ) {
+			matcher( matcherIn, matcherOut, context, xml );
 		}
-	};
 
-	div = null; // release memory in IE
-})();
+		if ( postFilter ) {
+			temp = condense( matcherOut, postMap );
+			postFilter( temp, [], context, xml );
 
-function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
-	var sibDir = dir == "previousSibling" && !isXML;
-	for ( var i = 0, l = checkSet.length; i < l; i++ ) {
-		var elem = checkSet[i];
-		if ( elem ) {
-			if ( sibDir && elem.nodeType === 1 ){
-				elem.sizcache = doneName;
-				elem.sizset = i;
+			i = temp.length;
+			while ( i-- ) {
+				if ( (elem = temp[i]) ) {
+					matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
+				}
 			}
-			elem = elem[dir];
-			var match = false;
+		}
 
-			while ( elem ) {
-				if ( elem.sizcache === doneName ) {
-					match = checkSet[elem.sizset];
-					break;
+		if ( seed ) {
+			if ( postFinder || preFilter ) {
+				if ( postFinder ) {
+					temp = [];
+					i = matcherOut.length;
+					while ( i-- ) {
+						if ( (elem = matcherOut[i]) ) {
+							temp.push( (matcherIn[i] = elem) );
+						}
+					}
+					postFinder( null, (matcherOut = []), temp, xml );
 				}
 
-				if ( elem.nodeType === 1 && !isXML ){
-					elem.sizcache = doneName;
-					elem.sizset = i;
-				}
+				i = matcherOut.length;
+				while ( i-- ) {
+					if ( (elem = matcherOut[i]) &&
+						(temp = postFinder ? indexOf.call( seed, elem ) : preMap[i]) > -1 ) {
 
-				if ( elem.nodeName === cur ) {
-					match = elem;
-					break;
+						seed[temp] = !(results[temp] = elem);
+					}
 				}
+			}
 
-				elem = elem[dir];
+		} else {
+			matcherOut = condense(
+				matcherOut === results ?
+					matcherOut.splice( preexisting, matcherOut.length ) :
+					matcherOut
+			);
+			if ( postFinder ) {
+				postFinder( null, results, matcherOut, xml );
+			} else {
+				push.apply( results, matcherOut );
 			}
+		}
+	});
+}
 
-			checkSet[i] = match;
+function matcherFromTokens( tokens ) {
+	var checkContext, matcher, j,
+		len = tokens.length,
+		leadingRelative = Expr.relative[ tokens[0].type ],
+		implicitRelative = leadingRelative || Expr.relative[" "],
+		i = leadingRelative ? 1 : 0,
+
+		matchContext = addCombinator( function( elem ) {
+			return elem === checkContext;
+		}, implicitRelative, true ),
+		matchAnyContext = addCombinator( function( elem ) {
+			return indexOf.call( checkContext, elem ) > -1;
+		}, implicitRelative, true ),
+		matchers = [ function( elem, context, xml ) {
+			return ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
+				(checkContext = context).nodeType ?
+					matchContext( elem, context, xml ) :
+					matchAnyContext( elem, context, xml ) );
+		} ];
+
+	for ( ; i < len; i++ ) {
+		if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
+			matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
+		} else {
+			matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );
+
+			if ( matcher[ expando ] ) {
+				j = ++i;
+				for ( ; j < len; j++ ) {
+					if ( Expr.relative[ tokens[j].type ] ) {
+						break;
+					}
+				}
+				return setMatcher(
+					i > 1 && elementMatcher( matchers ),
+					i > 1 && toSelector(
+						tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
+					).replace( rtrim, "$1" ),
+					matcher,
+					i < j && matcherFromTokens( tokens.slice( i, j ) ),
+					j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
+					j < len && toSelector( tokens )
+				);
+			}
+			matchers.push( matcher );
 		}
 	}
+
+	return elementMatcher( matchers );
 }
 
-function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
-	var sibDir = dir == "previousSibling" && !isXML;
-	for ( var i = 0, l = checkSet.length; i < l; i++ ) {
-		var elem = checkSet[i];
-		if ( elem ) {
-			if ( sibDir && elem.nodeType === 1 ) {
-				elem.sizcache = doneName;
-				elem.sizset = i;
+function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
+	var bySet = setMatchers.length > 0,
+		byElement = elementMatchers.length > 0,
+		superMatcher = function( seed, context, xml, results, outermost ) {
+			var elem, j, matcher,
+				matchedCount = 0,
+				i = "0",
+				unmatched = seed && [],
+				setMatched = [],
+				contextBackup = outermostContext,
+				elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
+				dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
+				len = elems.length;
+
+			if ( outermost ) {
+				outermostContext = context !== document && context;
 			}
-			elem = elem[dir];
-			var match = false;
 
-			while ( elem ) {
-				if ( elem.sizcache === doneName ) {
-					match = checkSet[elem.sizset];
-					break;
+			for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
+				if ( byElement && elem ) {
+					j = 0;
+					while ( (matcher = elementMatchers[j++]) ) {
+						if ( matcher( elem, context, xml ) ) {
+							results.push( elem );
+							break;
+						}
+					}
+					if ( outermost ) {
+						dirruns = dirrunsUnique;
+					}
 				}
 
-				if ( elem.nodeType === 1 ) {
-					if ( !isXML ) {
-						elem.sizcache = doneName;
-						elem.sizset = i;
+				if ( bySet ) {
+					if ( (elem = !matcher && elem) ) {
+						matchedCount--;
 					}
-					if ( typeof cur !== "string" ) {
-						if ( elem === cur ) {
-							match = true;
-							break;
-						}
 
-					} else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
-						match = elem;
-						break;
+					if ( seed ) {
+						unmatched.push( elem );
 					}
 				}
+			}
 
-				elem = elem[dir];
+			matchedCount += i;
+			if ( bySet && i !== matchedCount ) {
+				j = 0;
+				while ( (matcher = setMatchers[j++]) ) {
+					matcher( unmatched, setMatched, context, xml );
+				}
+
+				if ( seed ) {
+					if ( matchedCount > 0 ) {
+						while ( i-- ) {
+							if ( !(unmatched[i] || setMatched[i]) ) {
+								setMatched[i] = pop.call( results );
+							}
+						}
+					}
+
+					setMatched = condense( setMatched );
+				}
+
+				push.apply( results, setMatched );
+
+				if ( outermost && !seed && setMatched.length > 0 &&
+					( matchedCount + setMatchers.length ) > 1 ) {
+
+					Sizzle.uniqueSort( results );
+				}
 			}
 
-			checkSet[i] = match;
-		}
-	}
+			if ( outermost ) {
+				dirruns = dirrunsUnique;
+				outermostContext = contextBackup;
+			}
+
+			return unmatched;
+		};
+
+	return bySet ?
+		markFunction( superMatcher ) :
+		superMatcher;
 }
 
-var contains = document.compareDocumentPosition ?  function(a, b){
-	return a.compareDocumentPosition(b) & 16;
-} : function(a, b){
-	return a !== b && (a.contains ? a.contains(b) : true);
-};
+compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
+	var i,
+		setMatchers = [],
+		elementMatchers = [],
+		cached = compilerCache[ selector + " " ];
 
-var isXML = function(elem){
-	return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
-		!!elem.ownerDocument && elem.ownerDocument.documentElement.nodeName !== "HTML";
-};
+	if ( !cached ) {
+		if ( !match ) {
+			match = tokenize( selector );
+		}
+		i = match.length;
+		while ( i-- ) {
+			cached = matcherFromTokens( match[i] );
+			if ( cached[ expando ] ) {
+				setMatchers.push( cached );
+			} else {
+				elementMatchers.push( cached );
+			}
+		}
 
-var posProcess = function(selector, context){
-	var tmpSet = [], later = "", match,
-		root = context.nodeType ? [context] : context;
+		cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
 
-	while ( (match = Expr.match.PSEUDO.exec( selector )) ) {
-		later += match[0];
-		selector = selector.replace( Expr.match.PSEUDO, "" );
+		cached.selector = selector;
 	}
+	return cached;
+};
 
-	selector = Expr.relative[selector] ? selector + "*" : selector;
+/**
+ * A low-level selection function that works with Sizzle's compiled
+ *  selector functions
+ * @param {String|Function} selector A selector or a pre-compiled
+ *  selector function built with Sizzle.compile
+ * @param {Element} context
+ * @param {Array} [results]
+ * @param {Array} [seed] A set of elements to match against
+ */
+select = Sizzle.select = function( selector, context, results, seed ) {
+	var i, tokens, token, type, find,
+		compiled = typeof selector === "function" && selector,
+		match = !seed && tokenize( (selector = compiled.selector || selector) );
+
+	results = results || [];
+
+	if ( match.length === 1 ) {
 
-	for ( var i = 0, l = root.length; i < l; i++ ) {
-		Sizzle( selector, root[i], tmpSet );
+		tokens = match[0] = match[0].slice( 0 );
+		if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
+				support.getById && context.nodeType === 9 && documentIsHTML &&
+				Expr.relative[ tokens[1].type ] ) {
+
+			context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
+			if ( !context ) {
+				return results;
+
+			} else if ( compiled ) {
+				context = context.parentNode;
+			}
+
+			selector = selector.slice( tokens.shift().value.length );
+		}
+
+		i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
+		while ( i-- ) {
+			token = tokens[i];
+
+			if ( Expr.relative[ (type = token.type) ] ) {
+				break;
+			}
+			if ( (find = Expr.find[ type ]) ) {
+				if ( (seed = find(
+					token.matches[0].replace( runescape, funescape ),
+					rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
+				)) ) {
+
+					tokens.splice( i, 1 );
+					selector = seed.length && toSelector( tokens );
+					if ( !selector ) {
+						push.apply( results, seed );
+						return results;
+					}
+
+					break;
+				}
+			}
+		}
 	}
 
-	return Sizzle.filter( later, tmpSet );
+	( compiled || compile( selector, match ) )(
+		seed,
+		context,
+		!documentIsHTML,
+		results,
+		rsibling.test( selector ) && testContext( context.parentNode ) || context
+	);
+	return results;
 };
 
 
-window.Sizzle = Sizzle;
+support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;
 
+support.detectDuplicates = !!hasDuplicate;
+
+setDocument();
+
+support.sortDetached = assert(function( div1 ) {
+	return div1.compareDocumentPosition( document.createElement("div") ) & 1;
+});
+
+if ( !assert(function( div ) {
+	div.innerHTML = "<a href='#'></a>";
+	return div.firstChild.getAttribute("href") === "#" ;
+}) ) {
+	addHandle( "type|href|height|width", function( elem, name, isXML ) {
+		if ( !isXML ) {
+			return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
+		}
+	});
+}
+
+if ( !support.attributes || !assert(function( div ) {
+	div.innerHTML = "<input/>";
+	div.firstChild.setAttribute( "value", "" );
+	return div.firstChild.getAttribute( "value" ) === "";
+}) ) {
+	addHandle( "value", function( elem, name, isXML ) {
+		if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
+			return elem.defaultValue;
+		}
+	});
+}
+
+if ( !assert(function( div ) {
+	return div.getAttribute("disabled") == null;
+}) ) {
+	addHandle( booleans, function( elem, name, isXML ) {
+		var val;
+		if ( !isXML ) {
+			return elem[ name ] === true ? name.toLowerCase() :
+					(val = elem.getAttributeNode( name )) && val.specified ?
+					val.value :
+				null;
+		}
+	});
+}
+
+if ( typeof define === "function" && define.amd ) {
+	define(function() { return Sizzle; });
+} else if ( typeof module !== "undefined" && module.exports ) {
+	module.exports = Sizzle;
+} else {
+	window.Sizzle = Sizzle;
+}
+
+})( window );
+
+;(function() {
+  if (typeof Sizzle !== 'undefined') {
+    return;
+  }
+
+  if (typeof define !== 'undefined' && define.amd) {
+    window.Sizzle = Prototype._actual_sizzle;
+    window.define = Prototype._original_define;
+    delete Prototype._actual_sizzle;
+    delete Prototype._original_define;
+  } else if (typeof module !== 'undefined' && module.exports) {
+    window.Sizzle = module.exports;
+    module.exports = {};
+  }
 })();
 
 ;(function(engine) {
@@ -4979,15 +6327,23 @@ var Form = {
       accumulator = function(result, key, value) {
         if (key in result) {
           if (!Object.isArray(result[key])) result[key] = [result[key]];
-          result[key].push(value);
+          result[key] = result[key].concat(value);
         } else result[key] = value;
         return result;
       };
     } else {
       initial = '';
-      accumulator = function(result, key, value) {
-        return result + (result ? '&' : '') + encodeURIComponent(key) + '=' + encodeURIComponent(value);
-      }
+      accumulator = function(result, key, values) {
+        if (!Object.isArray(values)) {values = [values];}
+        if (!values.length) {return result;}
+        var encodedKey = encodeURIComponent(key).gsub(/%20/, '+');
+        return result + (result ? "&" : "") + values.map(function (value) {
+          value = value.gsub(/(\r)?\n/, '\r\n');
+          value = encodeURIComponent(value);
+          value = value.gsub(/%20/, '+');
+          return encodedKey + "=" + value;
+        }).join("&");
+      };
     }
 
     return elements.inject(initial, function(result, element) {
@@ -5008,19 +6364,16 @@ Form.Methods = {
     return Form.serializeElements(Form.getElements(form), options);
   },
 
+
   getElements: function(form) {
-    var elements = $(form).getElementsByTagName('*'),
-        element,
-        arr = [ ],
-        serializers = Form.Element.Serializers;
+    var elements = $(form).getElementsByTagName('*');
+    var element, results = [], serializers = Form.Element.Serializers;
+
     for (var i = 0; element = elements[i]; i++) {
-      arr.push(element);
+      if (serializers[element.tagName.toLowerCase()])
+        results.push(Element.extend(element));
     }
-    return arr.inject([], function(elements, child) {
-      if (serializers[child.tagName.toLowerCase()])
-        elements.push(Element.extend(child));
-      return elements;
-    })
+    return results;
   },
 
   getInputs: function(form, typeName, name) {
@@ -5330,7 +6683,11 @@ Form.EventObserver = Class.create(Abstract.EventObserver, {
     return Form.serialize(this.element);
   }
 });
-(function() {
+(function(GLOBAL) {
+  var DIV = document.createElement('div');
+  var docEl = document.documentElement;
+  var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
+   && 'onmouseleave' in docEl;
 
   var Event = {
     KEY_BACKSPACE: 8,
@@ -5346,16 +6703,9 @@ Form.EventObserver = Class.create(Abstract.EventObserver, {
     KEY_END:      35,
     KEY_PAGEUP:   33,
     KEY_PAGEDOWN: 34,
-    KEY_INSERT:   45,
-
-    cache: {}
+    KEY_INSERT:   45
   };
 
-  var docEl = document.documentElement;
-  var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
-    && 'onmouseleave' in docEl;
-
-
 
   var isIELegacyEvent = function(event) { return false; };
 
@@ -5411,6 +6761,10 @@ Form.EventObserver = Class.create(Abstract.EventObserver, {
   function isRightClick(event)  { return _isButton(event, 2) }
 
   function element(event) {
+    return Element.extend(_element(event));
+  }
+
+  function _element(event) {
     event = Event.extend(event);
 
     var node = event.target, type = event.type,
@@ -5423,20 +6777,15 @@ Form.EventObserver = Class.create(Abstract.EventObserver, {
             node = currentTarget;
     }
 
-    if (node.nodeType == Node.TEXT_NODE)
-      node = node.parentNode;
-
-    return Element.extend(node);
+    return node.nodeType == Node.TEXT_NODE ? node.parentNode : node;
   }
 
   function findElement(event, expression) {
-    var element = Event.element(event);
-
-    if (!expression) return element;
+    var element = _element(event), selector = Prototype.Selector;
+    if (!expression) return Element.extend(element);
     while (element) {
-      if (Object.isElement(element) && Prototype.Selector.match(element, expression)) {
+      if (Object.isElement(element) && selector.match(element, expression))
         return Element.extend(element);
-      }
       element = element.parentNode;
     }
   }
@@ -5548,198 +6897,268 @@ Form.EventObserver = Class.create(Abstract.EventObserver, {
     Object.extend(Event.prototype, methods);
   }
 
-  function _createResponder(element, eventName, handler) {
-    var registry = Element.retrieve(element, 'prototype_event_registry');
+  var EVENT_TRANSLATIONS = {
+    mouseenter: 'mouseover',
+    mouseleave: 'mouseout'
+  };
 
-    if (Object.isUndefined(registry)) {
-      CACHE.push(element);
-      registry = Element.retrieve(element, 'prototype_event_registry', $H());
-    }
+  function getDOMEventName(eventName) {
+    return EVENT_TRANSLATIONS[eventName] || eventName;
+  }
 
-    var respondersForEvent = registry.get(eventName);
-    if (Object.isUndefined(respondersForEvent)) {
-      respondersForEvent = [];
-      registry.set(eventName, respondersForEvent);
-    }
+  if (MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED)
+    getDOMEventName = Prototype.K;
 
-    if (respondersForEvent.pluck('handler').include(handler)) return false;
+  function getUniqueElementID(element) {
+    if (element === window) return 0;
 
-    var responder;
-    if (eventName.include(":")) {
-      responder = function(event) {
-        if (Object.isUndefined(event.eventName))
-          return false;
+    if (typeof element._prototypeUID === 'undefined')
+      element._prototypeUID = Element.Storage.UID++;
+    return element._prototypeUID;
+  }
 
-        if (event.eventName !== eventName)
-          return false;
+  function getUniqueElementID_IE(element) {
+    if (element === window) return 0;
+    if (element == document) return 1;
+    return element.uniqueID;
+  }
 
-        Event.extend(event, element);
-        handler.call(element, event);
-      };
-    } else {
-      if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED &&
-       (eventName === "mouseenter" || eventName === "mouseleave")) {
-        if (eventName === "mouseenter" || eventName === "mouseleave") {
-          responder = function(event) {
-            Event.extend(event, element);
-
-            var parent = event.relatedTarget;
-            while (parent && parent !== element) {
-              try { parent = parent.parentNode; }
-              catch(e) { parent = element; }
-            }
-
-            if (parent === element) return;
-
-            handler.call(element, event);
-          };
-        }
-      } else {
-        responder = function(event) {
-          Event.extend(event, element);
-          handler.call(element, event);
-        };
-      }
-    }
+  if ('uniqueID' in DIV)
+    getUniqueElementID = getUniqueElementID_IE;
 
-    responder.handler = handler;
-    respondersForEvent.push(responder);
-    return responder;
+  function isCustomEvent(eventName) {
+    return eventName.include(':');
   }
 
-  function _destroyCache() {
-    for (var i = 0, length = CACHE.length; i < length; i++) {
-      Event.stopObserving(CACHE[i]);
-      CACHE[i] = null;
-    }
-  }
+  Event._isCustomEvent = isCustomEvent;
 
-  var CACHE = [];
+  function getOrCreateRegistryFor(element, uid) {
+    var CACHE = GLOBAL.Event.cache;
+    if (Object.isUndefined(uid))
+      uid = getUniqueElementID(element);
+    if (!CACHE[uid]) CACHE[uid] = { element: element };
+    return CACHE[uid];
+  }
 
-  if (Prototype.Browser.IE)
-    window.attachEvent('onunload', _destroyCache);
+  function destroyRegistryForElement(element, uid) {
+    if (Object.isUndefined(uid))
+      uid = getUniqueElementID(element);
+    delete GLOBAL.Event.cache[uid];
+  }
 
-  if (Prototype.Browser.WebKit)
-    window.addEventListener('unload', Prototype.emptyFunction, false);
 
+  function register(element, eventName, handler) {
+    var registry = getOrCreateRegistryFor(element);
+    if (!registry[eventName]) registry[eventName] = [];
+    var entries = registry[eventName];
 
-  var _getDOMEventName = Prototype.K,
-      translations = { mouseenter: "mouseover", mouseleave: "mouseout" };
+    var i = entries.length;
+    while (i--)
+      if (entries[i].handler === handler) return null;
 
-  if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED) {
-    _getDOMEventName = function(eventName) {
-      return (translations[eventName] || eventName);
+    var uid = getUniqueElementID(element);
+    var responder = GLOBAL.Event._createResponder(uid, eventName, handler);
+    var entry = {
+      responder: responder,
+      handler:   handler
     };
+
+    entries.push(entry);
+    return entry;
   }
 
+  function unregister(element, eventName, handler) {
+    var registry = getOrCreateRegistryFor(element);
+    var entries = registry[eventName] || [];
+
+    var i = entries.length, entry;
+    while (i--) {
+      if (entries[i].handler === handler) {
+        entry = entries[i];
+        break;
+      }
+    }
+
+    if (entry) {
+      var index = entries.indexOf(entry);
+      entries.splice(index, 1);
+    }
+
+    if (entries.length === 0) {
+      delete registry[eventName];
+      if (Object.keys(registry).length === 1 && ('element' in registry))
+        destroyRegistryForElement(element);
+    }
+
+    return entry;
+  }
+
+
   function observe(element, eventName, handler) {
     element = $(element);
+    var entry = register(element, eventName, handler);
 
-    var responder = _createResponder(element, eventName, handler);
+    if (entry === null) return element;
 
-    if (!responder) return element;
+    var responder = entry.responder;
+    if (isCustomEvent(eventName))
+      observeCustomEvent(element, eventName, responder);
+    else
+      observeStandardEvent(element, eventName, responder);
 
-    if (eventName.include(':')) {
-      if (element.addEventListener)
-        element.addEventListener("dataavailable", responder, false);
-      else {
-        element.attachEvent("ondataavailable", responder);
-        element.attachEvent("onlosecapture", responder);
-      }
-    } else {
-      var actualEventName = _getDOMEventName(eventName);
+    return element;
+  }
 
-      if (element.addEventListener)
-        element.addEventListener(actualEventName, responder, false);
-      else
-        element.attachEvent("on" + actualEventName, responder);
+  function observeStandardEvent(element, eventName, responder) {
+    var actualEventName = getDOMEventName(eventName);
+    if (element.addEventListener) {
+      element.addEventListener(actualEventName, responder, false);
+    } else {
+      element.attachEvent('on' + actualEventName, responder);
     }
+  }
 
-    return element;
+  function observeCustomEvent(element, eventName, responder) {
+    if (element.addEventListener) {
+      element.addEventListener('dataavailable', responder, false);
+    } else {
+      element.attachEvent('ondataavailable', responder);
+      element.attachEvent('onlosecapture',   responder);
+    }
   }
 
   function stopObserving(element, eventName, handler) {
     element = $(element);
+    var handlerGiven = !Object.isUndefined(handler),
+     eventNameGiven = !Object.isUndefined(eventName);
 
-    var registry = Element.retrieve(element, 'prototype_event_registry');
-    if (!registry) return element;
-
-    if (!eventName) {
-      registry.each( function(pair) {
-        var eventName = pair.key;
-        stopObserving(element, eventName);
-      });
+    if (!eventNameGiven && !handlerGiven) {
+      stopObservingElement(element);
       return element;
     }
 
-    var responders = registry.get(eventName);
-    if (!responders) return element;
-
-    if (!handler) {
-      responders.each(function(r) {
-        stopObserving(element, eventName, r.handler);
-      });
+    if (!handlerGiven) {
+      stopObservingEventName(element, eventName);
       return element;
     }
 
-    var i = responders.length, responder;
-    while (i--) {
-      if (responders[i].handler === handler) {
-        responder = responders[i];
-        break;
-      }
+    var entry = unregister(element, eventName, handler);
+
+    if (!entry) return element;
+    removeEvent(element, eventName, entry.responder);
+    return element;
+  }
+
+  function stopObservingStandardEvent(element, eventName, responder) {
+    var actualEventName = getDOMEventName(eventName);
+    if (element.removeEventListener) {
+      element.removeEventListener(actualEventName, responder, false);
+    } else {
+      element.detachEvent('on' + actualEventName, responder);
     }
-    if (!responder) return element;
+  }
 
-    if (eventName.include(':')) {
-      if (element.removeEventListener)
-        element.removeEventListener("dataavailable", responder, false);
-      else {
-        element.detachEvent("ondataavailable", responder);
-        element.detachEvent("onlosecapture", responder);
-      }
+  function stopObservingCustomEvent(element, eventName, responder) {
+    if (element.removeEventListener) {
+      element.removeEventListener('dataavailable', responder, false);
     } else {
-      var actualEventName = _getDOMEventName(eventName);
-      if (element.removeEventListener)
-        element.removeEventListener(actualEventName, responder, false);
-      else
-        element.detachEvent('on' + actualEventName, responder);
+      element.detachEvent('ondataavailable', responder);
+      element.detachEvent('onlosecapture',   responder);
     }
+  }
 
-    registry.set(eventName, responders.without(responder));
 
-    return element;
+
+  function stopObservingElement(element) {
+    var uid = getUniqueElementID(element), registry = GLOBAL.Event.cache[uid];
+    if (!registry) return;
+
+    destroyRegistryForElement(element, uid);
+
+    var entries, i;
+    for (var eventName in registry) {
+      if (eventName === 'element') continue;
+
+      entries = registry[eventName];
+      i = entries.length;
+      while (i--)
+        removeEvent(element, eventName, entries[i].responder);
+    }
   }
 
-  function fire(element, eventName, memo, bubble) {
-    element = $(element);
+  function stopObservingEventName(element, eventName) {
+    var registry = getOrCreateRegistryFor(element);
+    var entries = registry[eventName];
+    if (entries) {
+      delete registry[eventName];
+    }
 
-    if (Object.isUndefined(bubble))
-      bubble = true;
+    entries = entries || [];
 
-    if (element == document && document.createEvent && !element.dispatchEvent)
-      element = document.documentElement;
+    var i = entries.length;
+    while (i--)
+      removeEvent(element, eventName, entries[i].responder);
 
-    var event;
-    if (document.createEvent) {
-      event = document.createEvent('HTMLEvents');
-      event.initEvent('dataavailable', bubble, true);
-    } else {
-      event = document.createEventObject();
-      event.eventType = bubble ? 'ondataavailable' : 'onlosecapture';
+    for (var name in registry) {
+      if (name === 'element') continue;
+      return; // There is another registered event
     }
 
-    event.eventName = eventName;
-    event.memo = memo || { };
+    destroyRegistryForElement(element);
+  }
 
-    if (document.createEvent)
-      element.dispatchEvent(event);
+
+  function removeEvent(element, eventName, handler) {
+    if (isCustomEvent(eventName))
+      stopObservingCustomEvent(element, eventName, handler);
     else
-      element.fireEvent(event.eventType, event);
+      stopObservingStandardEvent(element, eventName, handler);
+  }
+
 
+
+  function getFireTarget(element) {
+    if (element !== document) return element;
+    if (document.createEvent && !element.dispatchEvent)
+      return document.documentElement;
+    return element;
+  }
+
+  function fire(element, eventName, memo, bubble) {
+    element = getFireTarget($(element));
+    if (Object.isUndefined(bubble)) bubble = true;
+    memo = memo || {};
+
+    var event = fireEvent(element, eventName, memo, bubble);
     return Event.extend(event);
   }
 
+  function fireEvent_DOM(element, eventName, memo, bubble) {
+    var event = document.createEvent('HTMLEvents');
+    event.initEvent('dataavailable', bubble, true);
+
+    event.eventName = eventName;
+    event.memo = memo;
+
+    element.dispatchEvent(event);
+    return event;
+  }
+
+  function fireEvent_IE(element, eventName, memo, bubble) {
+    var event = document.createEventObject();
+    event.eventType = bubble ? 'ondataavailable' : 'onlosecapture';
+
+    event.eventName = eventName;
+    event.memo = memo;
+
+    element.fireEvent(event.eventType, event);
+    return event;
+  }
+
+  var fireEvent = document.createEvent ? fireEvent_DOM : fireEvent_IE;
+
+
+
   Event.Handler = Class.create({
     initialize: function(element, eventName, selector, callback) {
       this.element   = $(element);
@@ -5749,6 +7168,7 @@ Form.EventObserver = Class.create(Abstract.EventObserver, {
       this.handler   = this.handleEvent.bind(this);
     },
 
+
     start: function() {
       Event.observe(this.element, this.eventName, this.handler);
       return this;
@@ -5805,59 +7225,145 @@ Form.EventObserver = Class.create(Abstract.EventObserver, {
     loaded:        false
   });
 
-  if (window.Event) Object.extend(window.Event, Event);
-  else window.Event = Event;
-})();
+  if (GLOBAL.Event) Object.extend(window.Event, Event);
+  else GLOBAL.Event = Event;
 
-(function() {
+  GLOBAL.Event.cache = {};
+
+  function destroyCache_IE() {
+    GLOBAL.Event.cache = null;
+  }
+
+  if (window.attachEvent)
+    window.attachEvent('onunload', destroyCache_IE);
+
+  DIV = null;
+  docEl = null;
+})(this);
+
+(function(GLOBAL) {
+  /* Code for creating leak-free event responders is based on work by
+   John-David Dalton. */
+
+  var docEl = document.documentElement;
+  var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
+    && 'onmouseleave' in docEl;
+
+  function isSimulatedMouseEnterLeaveEvent(eventName) {
+    return !MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED &&
+     (eventName === 'mouseenter' || eventName === 'mouseleave');
+  }
+
+  function createResponder(uid, eventName, handler) {
+    if (Event._isCustomEvent(eventName))
+      return createResponderForCustomEvent(uid, eventName, handler);
+    if (isSimulatedMouseEnterLeaveEvent(eventName))
+      return createMouseEnterLeaveResponder(uid, eventName, handler);
+
+    return function(event) {
+      if (!Event.cache) return;
+
+      var element = Event.cache[uid].element;
+      Event.extend(event, element);
+      handler.call(element, event);
+    };
+  }
+
+  function createResponderForCustomEvent(uid, eventName, handler) {
+    return function(event) {
+      var cache = Event.cache[uid];
+      var element =  cache && cache.element;
+
+      if (Object.isUndefined(event.eventName))
+        return false;
+
+      if (event.eventName !== eventName)
+        return false;
+
+      Event.extend(event, element);
+      handler.call(element, event);
+    };
+  }
+
+  function createMouseEnterLeaveResponder(uid, eventName, handler) {
+    return function(event) {
+      var element = Event.cache[uid].element;
+
+      Event.extend(event, element);
+      var parent = event.relatedTarget;
+
+      while (parent && parent !== element) {
+        try { parent = parent.parentNode; }
+        catch(e) { parent = element; }
+      }
+
+      if (parent === element) return;
+      handler.call(element, event);
+    }
+  }
+
+  GLOBAL.Event._createResponder = createResponder;
+  docEl = null;
+})(this);
+
+(function(GLOBAL) {
   /* Support for the DOMContentLoaded event is based on work by Dan Webb,
      Matthias Miller, Dean Edwards, John Resig, and Diego Perini. */
 
-  var timer;
+  var TIMER;
 
   function fireContentLoadedEvent() {
     if (document.loaded) return;
-    if (timer) window.clearTimeout(timer);
+    if (TIMER) window.clearTimeout(TIMER);
     document.loaded = true;
     document.fire('dom:loaded');
   }
 
   function checkReadyState() {
     if (document.readyState === 'complete') {
-      document.stopObserving('readystatechange', checkReadyState);
+      document.detachEvent('onreadystatechange', checkReadyState);
       fireContentLoadedEvent();
     }
   }
 
   function pollDoScroll() {
-    try { document.documentElement.doScroll('left'); }
-    catch(e) {
-      timer = pollDoScroll.defer();
+    try {
+      document.documentElement.doScroll('left');
+    } catch (e) {
+      TIMER = pollDoScroll.defer();
       return;
     }
+
+    fireContentLoadedEvent();
+  }
+
+
+  if (document.readyState === 'complete') {
     fireContentLoadedEvent();
+    return;
   }
 
   if (document.addEventListener) {
     document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);
   } else {
-    document.observe('readystatechange', checkReadyState);
-    if (window == top)
-      timer = pollDoScroll.defer();
+    document.attachEvent('onreadystatechange', checkReadyState);
+    if (window == top) TIMER = pollDoScroll.defer();
   }
 
   Event.observe(window, 'load', fireContentLoadedEvent);
-})();
+})(this);
 
-Element.addMethods();
 
+Element.addMethods();
 /*------------------------------- DEPRECATED -------------------------------*/
 
 Hash.toQueryString = Object.toQueryString;
 
 var Toggle = { display: Element.toggle };
 
-Element.Methods.childOf = Element.Methods.descendantOf;
+Element.addMethods({
+  childOf: Element.Methods.descendantOf
+});
 
 var Insertion = {
   Before: function(element, content) {
@@ -5999,10 +7505,10 @@ Element.ClassNames.prototype = {
     this.element = $(element);
   },
 
-  _each: function(iterator) {
+  _each: function(iterator, context) {
     this.element.className.split(/\s+/).select(function(name) {
       return name.length > 0;
-    })._each(iterator);
+    })._each(iterator, context);
   },
 
   set: function(className) {