.tundra .dijitTreeNodeRtl,.tundra .dijitTreeNodeRtl .dijitTreeExpandoLeaf {background-image: none;}.tundra .dijitTreeNodeRtl .dijitTreeExpandoOpened {background-image: url('images/treeExpand_minus_rtl.gif');}.tundra .dijitTreeNodeRtl .dijitTreeExpandoClosed {background-image: url('images/treeExpand_plus_rtl.gif');}