title: jquery for select all item in multiple select list box
body: <p>Jquery for select all item in multiply select list box.</p>
  
  <pre><code>$("#pl_new").find("option").each(function() {
       $(this).attr('selected', true);
  });
  </code></pre>
  
  <p>This is not work to select all item in list box when form submitted.</p>