title: html5 audio not play next song
body: <p>I have html5 code like this</p>
  
  <pre><code>&lt;audio controls autoplay&gt;
     &lt;source src="song/1.mp3" type="audio/mpeg"&gt;
     &lt;source src="song/2.mp3" type="audio/mpeg"&gt;
     &lt;source src="song/3.mp3" type="audio/mpeg"&gt;
     Your browser does not support the audio element.
  &lt;/audio&gt;
  </code></pre>
  
  <p>why it's play only lastest song <code>3.mp3</code> ? How i can give it auto play all song <code>1.mp2-&gt;2.mp3-&gt;3.mp3</code>?</p>