title: Adding an app bar in WP8.1 html5
body: <p>I tried to add appbar with WP8.1 using html5
  and I use this link to guide me
  <a href="http://msdn.microsoft.com/en-us/library/windows/apps/hh465309.aspx" rel="nofollow noreferrer">Quickstart: Adding an app bar with commands (HTML) </a></p>
  
  <p>But it shows me this problem (a bug) with no error, as you see the image.
  <img src="https://i.stack.imgur.com/BdRZ8.png" alt="enter image description here"></p>