function sfHover () {
	var sfEls = document.getElementById("navbar").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+="sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className= "";
		}
	}
}