rem: msgfolder = folder.QueryInterface(Components.interfaces.nsIMsgFolder); 
add: var msgfolder = folder.QueryInterface(Components.interfaces.nsIMsgFolder); 
context: function IsCurrentLoadedFolder(folder){	msgfolder = folder.QueryInterface(Components.interfaces.nsIMsgFolder);	if(msgfolder)	{		var folderResource = msgfolder.QueryInterface(Components.interfaces.nsIRDFResource);		if(folderResource)		{			var folderURI = folderResource.Value;			var currentLoadedFolder = GetThreadTreeFolder();			var currentURI = currentLoadedFolder.getAttribute('ref');			return(currentURI == folderURI);		}	}	return false;}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/aa26ea7210202a394b5cf3b7f0a9a735ad86e236/msgMail3PaneWindow.js/clean/mailnews/base/resources/content/msgMail3PaneWindow.js