sfHover = function() {
 var sfEls = document.menusan.getElementsByTagName('li');
 for (var j=0; j<sfEls.length; j++) {
  sfEls[j].onmouseover=function() {
   this.className+=' sfhover';
  }
  sfEls[j].onmouseout=function() {
   this.className=this.className.replace(new RegExp(' sfhover\\b'), '');
  }
 } 
}
if (window.attachEvent) window.attachEvent('onload', sfHover);