function menuFix() {
 var sfEls = document.getElementById("nav").getElementsByTagName("li");
 for (var i=0; i<sfEls.length; i++) {
  sfEls[i].onmouseover=function() {
  this.className=(this.className.length>0? " ": "") + "sfhover";
  }
  sfEls[i].onMouseDown=function() {
  this.className=(this.className.length>0? " ": "") + "sfhover";
  }
  sfEls[i].onMouseUp=function() {
  this.className=(this.className.length>0? " ": "") + "sfhover";
  }
  sfEls[i].onmouseout = function() {
   this.className=(this.className.length>0? " ": "") + "nohover";
  }  
 }
}
window.onload=menuFix;