<!--
   sfHover = function() {
   	var sfEls = document.getElementById("top_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);
//-->