function isMouseLeaveOrEnter(e, handler) {   
        if (e.type != 'mouseout' && e.type != 'mouseover') return false;   
         var reltg = e.relatedTarget ? e.relatedTarget : e.type == 'mouseout' ? e.toElement : e.fromElement;   
         while (reltg && reltg != handler)   
            reltg = reltg.parentNode;   
         return (reltg != handler);   
     }