title: How to I undo .detach()?
body: <p>I'm using JQuery 1.5 and the following code to detach li elements w/ a certain class when a button is clicked.  What I want to know is, when that button is clicked again, how do I add the element back onto the page?</p>
  
  <pre><code>    &lt;script&gt;
      $("#remove").click(function () {
        $('li.type').fadeOut(300, function() { $(this).detach(); });
      });&lt;/script&gt;
  </code></pre>