function showsection(obj)
{
  if ( !obj ) return;

  var subobj = obj.getElementsByTagName('div')[0];
  if ( !subobj ) return;

  subobj.className      = 'submenu_1';
  subobj.style.display  = 'block';
}

function hidesection(obj)
{
  if ( !obj ) return;

  var subobj = obj.getElementsByTagName('div')[0];
  if ( !subobj ) return;

  subobj.className      = 'submenu_0';
  subobj.style.display  = 'none';
}