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);