rem: dd ("** Bogus id '" + id + "' passed to isVisible() **"); 
add: dd ("** Bogus id ``" + id + "'' passed to isVisible() **"); 
context: function isVisible (id){    var e = document.getElementById(id);    if (!e)    {        dd ("** Bogus id '" + id + "' passed to isVisible() **");        return false;    }        return (e.getAttribute ("collapsed") != "true");}
meta: 1567	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1567/d48f16433de56d67c17f622c4f28d42121e461fc/static.js/buggy/xul/content/static.js