function popup(url, w, h) {window.open(url, '', 'resizable=no,scrollbars=no,menubar=no,width='+w+',height='+h+', top=10,left=10');}

sfHover = function() {
	var sfEls = document.getElementById("cont_nav").getElementsByTagName("li");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
			}
		}
	}
if (window.attachEvent) window.attachEvent("onload", sfHover);