title: Re-populate drop down list options, how to clear options list and then re-populate?
body: <p>Re-populate drop down list options, how to clear options list and then re-populate?</p>
  
  <p>When a event fires, I need to wipe out the current contents of the drop down list #users, and then re-populate it via ajax.</p>
  
  <p>My ajax call is returning the HTML for the options like:</p>
  
  <pre><code>&lt;option name=blah1&gt;text1&lt;/option&gt;
  &lt;option name=blah2&gt;text2&lt;/option&gt;
  &lt;option name=blah3&gt;text3&lt;/option&gt;
  </code></pre>