Does anybody know about Vadim's JQuery plugin Swappable
<p><a href="http://www.eslinstructor.net/demo/swappable/swappable_grid.html" rel="nofollow">Vadim's JQuery plugin</a> Suppose i have four IDs which has different set of elements, I only want to swap three IDs elements and the fourth ID's elements is not swappable.  </p>

<p><strong>IDs :</strong> #foo, #zoo, #soo, #moo    [ each ID has different 'height' &amp; "width" ] </p>

<p><strong>Swappable :</strong>  #foo, #zoo, #soo  [ #moo is not swappable] </p>

<p>Q1. Want to check element's parent id is in among Swappable ID.  Line : 9  </p>

<p>Q2. if drag &amp; drop elements parent are swappable and different, suppose <strong>drag_id.parentID = #foo, drop_id.parentID = #zoo</strong> then swap it's height &amp; width to each other. Line : 11,12,13</p>

<pre><code>1.     $("#foo, #zoo, #soo").swappable({  
2.        [#moo elements can't be drag but act as a drop (target)]
3.              ...
4.           stop: function(event, ui) { 
5.              var drag_id = ui.item[0].id;
6                var target_id = event.originalEvent.target.id;
7.           
8.  i want to confirm drag &amp; drop's parentID are swappable or not 
9.    e.g. ??  if($.ui.contains ( drag_id.parentID, target_id.parentID )) {
10      
11       if(drag_id.parentID != target_id.parentID)
12.           {  
13            then swap the width &amp; height of elements to each other }
14           }  }   });
</code></pre>
