How to check if jQuery is loaded and what version?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/1828237/check-if-jquery-has-been-loaded-then-load-it-if-false">check if jquery has been loaded, then load it if false</a>  </p>
</blockquote>



<p>How do I check if jQuery is loaded on a clients machine. The client may have JQuery loaded but I have no way of knowing. if they have it loaded how do I check the version and the prefix such as:</p>

<pre><code>$('.class')
JQuery('.class')
</code></pre>

<p>Thanks</p>
