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);