var sfHover = function() {
	var  menu = document.getElementById("mainmenu");
	if (menu) {
		var sfEls = menu.getElementsByTagName("LI");
		if (sfEls) {
			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"), "");
				}
			}
		}
	}
}

window.onload = sfHover;