var bb=navigator.appName;
if (bb=="Microsoft Internet Explorer")
{
   var bv=navigator.appVersion;
   var m=/MSIE 7./;
   if (bv.match(m)==null)
   {
      sfHover = function()
      {
         var sfEls = document.getElementById("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);
   }
}