over = function() {
 var sfEls = document.getElementById("nav").getElementsByTagName("LI");
 for (var i=0; i<sfEls.length; i++) {
  sfEls[i].onmouseover=function() {
   this.className+=" over";
  }
  sfEls[i].onmouseout=function() {
   this.className=this.className.replace(new RegExp("over"), "");
  }
 }
}
if (window.attachEvent) window.attachEvent("onload", over);
 
 sfHover = function() {
  var sfEls = document.getElementById("product_menu").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);