title: How can I change the TargetControlID of AutoCompleteExtender client side (javascript)?
body: <p>Normally, I can can set the TargetControlID server side using something like this:</p>
  
  <pre><code>    AutoCompleteExtender ace = new AutoCompleteExtender();
      ace.ID = "AutoCompleteExtender1";
      ace.TargetControlID = "whatever";
  </code></pre>
  
  <p>I know how to grab the AutoCompleteExtender client side, but I am looking for a method to update the TargetControlID client side too. Any ideas?</p>