sfHover = function(id) {
	var sfEls = document.getElementById(id).getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" hover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(/\s?hover/, "");
		}
	}
}