sfHover = function() {
	  var sfEls = document.getElementById("mainmenu").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);