title: jQuery UI sortable: how to emulate the 'beforeStart' event?
body: <p>im using the <a href="http://docs.jquery.com/UI/Sortable" rel="nofollow noreferrer">jQuery UI sortable plugin</a> for sort some tall fieldsets (~300px height).</p>
  
  <p>My goal is to hide the main content of that fieldset, keeping visible just the legend tag (that is actually the sortable handler)... the problem is that, as you can see in the <a href="http://docs.jquery.com/UI/Sortable#events" rel="nofollow noreferrer">standard events</a> of the sortable plugin, there is the <code>beforeStop</code> but not the <code>beforeStart</code>.</p>
  
  <p>That's the code I wrote:</p>
  
  <pre><code>$(document).ready(function(){
      $("#label-copy-list").sortable({
          handle : '.handle',
          start: function(){
              $(".sort-hidden").hide();
          },
          stop: function(){
              $(".sort-hidden").show();
          }
      });
  });
  </code></pre>
  
  <p>I've tryed to use the <code>start</code> event instead, but it work just at half: it hide the contents, but (i guess) just a second before, and the layout of them keep 'padded' as them are not hide..</p>
  
  <p>I know that this is all except that clear, so i've made some screenshot:</p>
  
  <p><a href="http://img94.imageshack.us/img94/5436/schermata1pf.png" rel="nofollow noreferrer">Screenshot 1</a>: the 'normal' situation with all the contents visibles, the contents aer in blue background
  <a href="http://img695.imageshack.us/img695/9740/schermata2n.png" rel="nofollow noreferrer">Screenshot 2</a>: what happen when the user start the drag'n'drop; all the contents get hidden, but the one that the user drag keep an height as its content is still shown (in orange the space i dont want to have)
  <a href="http://img532.imageshack.us/img532/9031/schermata3w.png" rel="nofollow noreferrer">Screenshot 3</a>: what i want to have when the user start to drag'n'drop the items</p>
  
  <p>I've been able to do what i want by first click on another button (that hide all the contents), and then start the dragging.</p>
  
  <p>Any idea?</p>