title: Shuffle multiple javascript arrays in the same way
body: <p>I've got two arrays</p>
  
  <pre><code>var mp3 = ['sing.mp3','song.mp3','tune.mp3','jam.mp3',etc];
  var ogg = ['sing.ogg','song.ogg','tune.ogg','jam.ogg',etc];
  </code></pre>
  
  <p>i need to shuffle both arrays so that they come out the same way, ex:</p>
  
  <pre><code>var mp3 = ['tune.mp3','song.mp3','jam.mp3','sing.mp3',etc];
  var ogg = ['tune.ogg','song.ogg','jam.ogg','sing.ogg',etc];
  </code></pre>
  
  <p>there's a few posts on stackoverflow that shuffle arrays in different ways--<a href="https://stackoverflow.com/questions/6274339/how-can-i-shuffle-an-array-in-javascript">this one is pretty great</a>--but none of them demonstrate how to shuffle two arrays in the same exact way.</p>
  
  <p>thnx!</p>