add: treeNode.builder.rebuild(); 
context: function chooseCategory( aNode ){	var category = "NC:SearchCategory?category=" + aNode.getAttribute("id");	debug("chooseCategory: '" + category + "'\n");	var treeNode = document.getElementById("engineList");	if (treeNode)	{		debug("\nSet search engine list to category='" + category + "'\n\n");		treeNode.setAttribute( "ref", category );	}	return(true);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/912e3ab7803f2d4e3b2c479dacf80418a5c64ea6/search-editor.js/clean/xpfe/components/search/resources/search-editor.js