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

       for (var i=0; i<sfEls.length; i++)
       {

          sfEls[i].onmouseover=function()
          {
             this.className+=" shover";
          }

          sfEls[i].onmouseout=function()
          {
             this.className=this.className.replace(new RegExp(" shover\\b"), "");
          }
       }
}
if(window.attachEvent) window.attachEvent("onload", sfHover);
/*window.onload=sfHover;*/