add: else ClearCardViewPane(); 
context: function UpdateCardView(){	var tree = document.getElementById('resultsTree');	if ( tree && tree.selectedItems && (tree.selectedItems.length == 1) )		DisplayCardViewPane(tree.selectedItems[0]);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/078a98078ccc758e47b15879cf498e8a67b60215/addressbook.js/clean/mailnews/addrbook/resources/content/addressbook.js