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