rem: if(event.detail == 2) 
add: if (event.detail == 2) 
context: function attachmentTreeClick(event){     // we only care about button 0 (left click) events    if (event.button != 0) return;    if(event.detail == 2) // double click    {    var target = event.originalTarget;		item = target.parentNode.parentNode;		if (item.localName == "treeitem")    {			var commandStringSuffix = item.getAttribute("commandSuffix");      var openString = 'openAttachment' + commandStringSuffix;      eval(openString);    }    }}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/de52f97892ef2b711104c2cfc908a0539464832d/msgHdrViewOverlay.js/buggy/mailnews/base/resources/content/msgHdrViewOverlay.js