sfHover = function() {

	if (!document.getElementById) return false;
	if (!document.getElementById("nav")) return false;

	var sfEls = document.getElementById("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);