jQuery drag-and-drop demo works. Now how to make it a form that can be submitted?
<p><a href="http://plugins.scbfolio.com/jquery_drag_drop_select/#Events" rel="nofollow">This</a> is exactly the behaviour I want: dragging items from a list to another.</p>

<p>Now, I would like to add a "submit" button so that I can save the chosen items on the server side.</p>

<p>How to do this?</p>

<ul>
<li>Create a hidden form, and update the input values in an <code>after_drop_action</code> method I would write in the page.</li>
<li>AJAX-call the server at each <code>after_drop_action</code> (I would rather avoid it unless absolutely necessary)</li>
<li>Something else? What is the usual way to do? It is basic but I have no experience with jQuery.</li>
</ul>
