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