title: Capture ESC event when exiting full screen mode
body: <p>Requirement for me I have to show a particular div in full screen mode when I press a button 
  and hide that div when the page comes back to normal mode.</p>
  
  <p>I am able to achieve full screen mode with the code :-</p>
  
  <pre><code>function launchFullscreen(element) {
      if (element.requestFullscreen) {
          $('#bmessages').show();
          element.requestFullscreen();
      } else if (element.mozRequestFullScreen) {
          $('#bmessages').show();
          element.mozRequestFullScreen();
      } else if (element.webkitRequestFullscreen) {
          $('#bmessages').show();
          element.webkitRequestFullscreen();
      } else if (element.msRequestFullscreen) {
          $('#bmessages').show();
          element.msRequestFullscreen();
      } else {
          console.log("Fullscreen Unavailable");
      }
  }
  </code></pre>
  
  <p>But I am unable to capture ESC or Deny event so that I can again hide that div? Please advice what I have to do?</p>