<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" xmlns:html="http://www.w3.org/1999/xhtml" title="Testcase bug 326644 - Crash when changing enumerated properties of objects in xul"> <html:script><![CDATA[ function doe() { document.documentElement.boxObject.firstChild.hidden = true; document.documentElement.boxObject.firstChild.tooltip = 'test'; } setTimeout(doe,100); ]]></html:script> </window>