var MENU = [
  [{"id":1},'Contents', null, null,
    [{"id":2},'Title Page', 'title.html', 'view'],
    [{"id":3},'Introduction', 'intro.html', 'view'],
    [{"id":4},'Warmups', null, null,
      [{"id":5},'Freight Train', 'frei.html', 'view'],
      [{"id":6},'Asturius', 'span.html', 'view'],
      [{"id":7},'In Christ', 'chri.html', 'view'],
    ],
    [{"id":8},'Six Easy Pieces', null, null,
      [{"id":9},'Adelita', 'adel.html', 'view'],
      [{"id":10},'Lagrima', 'lagr.html', 'view'],
      [{"id":11},'Romance', 'roma.html', 'view'],
      [{"id":12},'Étude in D', 'etud.html', 'view'],
      [{"id":13},'Gymnopedie #1', 'gymn.html', 'view'],
      [{"id":14},'Jesu, Joy of Man', 'jesu.html', 'view'],
    ],
  ]
];