function enableDropdownMenuForIE() {
  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 (j = 0; j < lis.length; j++) {
          if(lis[j].lastChild.tagName == 'UL') {
            lis[j].onmouseover = function() { this.lastChild.style.display = 'block'; }
            lis[j].onmouseout = function() { this.lastChild.style.display = 'none'; }
          }
        }
      }
    }
  }
}