<?xml version="1.0"?> <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> <window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <script> function getAnonymousNodes(e) { return SpecialPowers.unwrap(SpecialPowers.wrap(document).getAnonymousNodes(e)); } function init() { var tt = document.getElementById("textbox"); var hb = getAnonymousNodes(tt)[0]; // hbox var men = getAnonymousNodes(hb)[1]; // menupopup var menitem = men.childNodes[0]; // menuitem var hb2 = getAnonymousNodes(menitem)[1]; // hbox var label2 = hb2.childNodes[0]; // label men.menu = null; label2.click(); } window.addEventListener("load", init, false); </script> <textbox id="textbox"/> </window>