<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?> <window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" onload="boom()" class="reftest-wait"> <script> function boom() { try { var tree = document.getElementById("tree"); var col = tree.columns.getFirstColumn(); var treecols = document.getElementById("treecols"); treecols.parentNode.removeChild(treecols); var x = col.x; } finally { document.documentElement.removeAttribute("class"); } } </script> <tree rows="6" id="tree"> <treecols id="treecols"> <treecol id="firstname" label="First Name"/> </treecols> <treechildren id="treechildren"> <treeitem> <treerow> <treecell label="Bob"/> </treerow> </treeitem> </treechildren> </tree> </window>