var curPop = null;
         function clearCurrent() {
            // Hide the pop-up menu that is currently displayed.
            if (null != curPop)
               curPop.style.display = "";
            curPop = null;
         }

         function popup() {
                         clearCurrent();
            var el = event.srcElement;
            // Display a new menu option.
            if (("A" == el.tagName) &&
                  ("menu" == el.parentElement.parentElement.parentElement.parentElement.id)) {
               // Position and display the pop-up menu.
               var elpop = document.all[el.sourceIndex + 1];
               elpop.style.pixelLeft = el.parentElement.offsetLeft+7;
               elpop.style.pixelTop  = el.offsetTop +
                  document.all.menu.offsetTop+22;
               elpop.style.display = "block";
               curPop = elpop;
            }
            event.cancelBubble = true;
         }

         function highlight() {

            // Highlight and popup  the menu options.
            if (null != event.fromElement)
               if ((event.fromElement.tagName == "A") &&
                                  (event.fromElement.parentElement.parentElement.parentElement.parentElement.id == "menu"))
                                  {
                  event.fromElement.className = "";
                      }

            if (null != event.toElement)
               if ((event.toElement.tagName == "A") && (event.toElement.parentElement.parentElement.parentElement.parentElement.id == "menu"))
                                {
                                  popup();
                  event.toElement.className = "over";
                                }
         }