var sGlobalMenuOpened = "";

function OnOver()
{
   if (sGlobalMenuOpened.length != 0)
   {
      var oMenu = getObjectByID("My_Menu_" + sGlobalMenuOpened);
      if (oMenu != null)
      {
         oMenu.style.visibility = "hidden";
         oMenu.style.zIndex = -11;
         oMenu.style.left = "0px";
         oMenu.style.top = "0px";

         sGlobalMenuOpened = "";
      }
   }
}

function MenuOver(oEv)
{
   oEv.cancelBubble = true;
}

function MenuOpen(sName, oEv, parleft, partop)
{
   OnOver();

   var oMenu = getObjectByID("My_Menu_" + sName);
   if (oMenu != null)
   {
      var eve = oEv.target;
      if (eve == null)
      {
         eve = oEv.srcElement;
      }
      Position(oMenu, eve, parleft, partop);

      oMenu.style.zIndex = 11;
      oMenu.style.visibility = "visible";

      sGlobalMenuOpened = sName;
   }

   oEv.cancelBubble = true;
}