function expandOrCollapse(menu)
   {
     var ul = menu.nextSibling;
     while(ul.tagName != "UL") // Search for the next UL tag
     {
       ul = ul.nextSibling;
       if ( ul == null )
         return true;
     }
     if (    ul.style.display == "none"  
          || ul.style.display == "" )
       ul.style.display = "block";
     else  
       ul.style.display = "none";
     return false;
   }