title: Refresh a dynamic created fieldset
body: <p>how can i refresh a dynamic created fieldset with checkbox? 
  I fill the checkbox with local loaded data. If i click a delete button and the local saved data is deleted so the fieldset with the checkbox should be refreshed.
  I tried </p>
  
  <pre><code>$('#fieldset_item').trigger("create");
  $('#item_List').trigger("create");
  </code></pre>
  
  <p>fieldset_item is the name of fieldset and item_List the name of the page.</p>