function set_submenu(id)
      {

        for (i=2; i<=7; i++)
        {
          if (i==id)
          {
            document.getElementById('b'+i).src='./images/_b_00'+i+'_over.gif';

            if (document.getElementById('submenu_'+i))
            {
              document.getElementById('submenu_0').style.display='none';
              document.getElementById('submenu_'+i).style.display='';
            }
            else
            {
              document.getElementById('submenu_0').style.display='';
            }

          }
          else
          {
            document.getElementById('b'+i).src='./images/_b_00'+i+'.gif';

            if (document.getElementById('submenu_'+i))
            {
              document.getElementById('submenu_'+i).style.display='none';
            }

          }
        }

      }