JavaScript function snippet

gistfile1.js

var getAlbumName = function(trackName) {
  var albumName = null;
  var albums = {
    theDarkSideOfTheMoon: {
      title: 'The Dark Side of the Moon',
      tracks: [
        {title: 'Speak To Me'},
        {title: 'Breathe'},
        {title: 'On The Run'},
        {title: 'Time'},
        {title: 'The Great Gig In The Sky'},
        {title: 'Money'},
        {title: 'Us And Them'},
        {title: 'Any Colour You Like'},
        {title: 'Brain Damage'},
        {title: 'Eclipse'}
      ]
    }
  };
  
  for(_album in albums) {
    album = albums[_album];
    tracks = album['tracks'];
    for(idx in tracks) {
      track = tracks[idx];
      if(track['title'] == trackName) {
        albumName = album['title'];
        return albumName;
      }
    }
  }
};

getAlbumName('Breathe');