rem: else if(event.clickCount == 2) 
add: else if(event.detail == 2) 
context: function ThreadPaneOnClick(event){    var targetclass = event.target.getAttribute('class');    debug('targetclass = ' + targetclass + '\n');    if (targetclass == 'tree-cell-twisty') {        // The twisty is nested three below the treeitem:        // <treeitem>        //   <treerow>        //     <treecell>        //         <titledbutton class="tree-cell-twisty"> <!-- anonymous -->        var treeitem = event.target.parentNode.parentNode.parentNode;		var open = treeitem.getAttribute('open');		if(open == "true")		{			//open all of the children of the treeitem			msgNavigationService.OpenTreeitemAndDescendants(treeitem);		}    }	else if(event.clickCount == 2)	{		ThreadPaneDoubleClick(event.target.parentNode.parentNode);	}}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/b2e873d830c29ccf6c98e8cbdd766f76914e44ee/msgMail3PaneWindow.js/clean/mailnews/base/resources/content/msgMail3PaneWindow.js