title: Recognizing users vlc plugin installation?
body: <p>I use embed vlc plugin for demonstrating rtsp video stream on my web page.</p>
  
  <p>I include it into my page body in this way:</p>
  
  <pre><code>&lt;embed type="application/x-vlc-plugin" name="VLC" autoplay="yes"
  loop="no" volume="100" width="800" height="600" target="rtsp://url.to.stream"&gt;
  </code></pre>
  
  <p>But if user hasn't vlc player plugin installed there is no image, and it doesn't offer link to install it. How can I recognize if user has plugin or no (by JavaScript maybe), or maybe it is possible to add more attributes of <code>&lt;embed&gt;</code> element, with which it will offer plugin installation automatically?</p>