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.replace(new RegExp("( ?|^)sfhover\\b"), "");}
   }
}
window.onload=menuFix;