function MenueAuf(Men)
      {
        if(document.getElementById)
        {
          document.getElementById(Men).style.visibility="visible";
        }

        else if(document.all && !document.getElementById)
        {
          document.all[Men].style.visibility="visible";
        }
      }

      function MenueZu(Men)
      {
        if(document.getElementById)
        {
          document.getElementById(Men).style.visibility="hidden";
        }

        else if(document.all && !document.getElementById)
        {
          document.all[Men].style.visibility="hidden";
        }
      }