title: how to find selected elements with Jquery UI selectable
body: <p>I am looking for info on the event and ui objects the jQuery selectable events: "selecting", and "start" take as parameters. I cannot find this in the documentation and looping through the properties is no help.</p>
  
  <pre><code>$('#content_td_account').selectable({
      filter: 'li:not(".non_draggable")',
      selecting: function(event, ui) { 
      }
  });
  </code></pre>
  
  <p>Specifically I want to find what elements are being selected and check them to see if their parent elements are the same or not. I assumed this would be in the ui object some where. </p>