sfHover = function() {
	var sfEls = document.getElementById("topnav").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);
