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].onmouseout=function() {
					this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
				 }
			}
		}
		if (window.attachEvent) window.attachEvent("onload", sfHover);