title: How to retrieve iframe video id and do something when video is stop?
body: <pre><code>&lt;iframe id="show" src="activity/heading.html" class="object_adjust" controls frameborder="0" allowfullscreen&gt;&lt;/iframe&gt;
  </code></pre>
  
  <p>heading.html</p>
  
  <pre><code>     &lt;video  id="myVideo" controls autoplay&gt;
        &lt;source src="a.mp4" type="video/mp4"&gt;
      &lt;/video&gt;
  </code></pre>
  
  <p>How to retrieve iframe video id  and do something when video is stop?</p>