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(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"; }
          }
        }
      }
    }
  }
}
window.onload = enable_menues_for_ie;