title: Is it possible for some Javascript to detect whether Cisco Jabber is installed or not?
body: <p>I have write a protocol handler to launch the Cisco Jabber Device. Following is my code.</p>
  
  <pre><code>&lt;input onclick="javascript:window.location.href = 'movi:12345'  
   type="button" value="Launch" /&gt;
  </code></pre>
  
  <p>It launch the Cisco Jabber if it installed on client machine. But I want to show warning and download URL if not installed. How it is possible?  </p>