function enable_menues_for_ie(){
  if (document.all){
    uls = document.getElementsByTagName('UL');
    for(i = 0; i < uls.length; i++){
      if (uls[i].className == 'dropdown'){
        var lis = uls[i].getElementsByTagName('li');
        for (i = 0; i < lis.length; i++){
          if(lis[i].lastChild.tagName == 'UL'){
            lis[i].onmouseover = function() { this.lastChild.style.display = 'block'; this.lastChild.style.zIndex = '999'; }
            lis[i].onmouseout = function() { this.lastChild.style.display = 'none'; }
          }
        }
      }
    }
  }
}