title: Checking if Chrome Extension is installed or not
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/6293498/check-whether-user-has-my-chrome-extension-installed">Check whether user has my chrome extension installed</a>  </p>
  </blockquote>
  
  
  
  <p>is there any easy way to display a div for users that have an chrome extension installed and different div for users that dont have, something like this:</p>
  
  <pre><code>&lt;div&gt;X Chrome Extension is installed&lt;/div&gt;
  
  &lt;div&gt;X Chrome Extension is not isntalled&lt;/div&gt;
  </code></pre>
  
  <p>php or javascript something.</p>