add: ClearMessagePane();  
context: function FolderPaneSelectionChange(){	var tree = GetFolderTree();	if(tree)	{		var selArray = tree.selectedItems;		if ( selArray && (selArray.length == 1) )        {			ChangeFolderByDOMNode(selArray[0]);            // explicitly force the message pane to get cleared when we switch folders            ClearMessagePane();         }		else		{			var threadTree = GetThreadTree();			ClearThreadTreeSelection();			threadTree.setAttribute('ref', null);			ClearMessagePane();		}	}}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/04c7fee48ac41078aa2e8c28704300aaa61bbda1/commandglue.js/clean/mailnews/base/resources/content/commandglue.js