title: JQ UI Sortables: Stop some elements inside Sortable from being sorted
body: <p>I have this sortable's structure (it's a portlet). </p>
  
  <pre><code>&lt;div id="sortable"&gt;
     &lt;div class="row"&gt;
         &lt;div class="window"&gt;&lt;/div&gt;
         &lt;div class="gripper_v"&gt;&lt;/div&gt;
         &lt;div class="window"&gt;&lt;/div&gt;
     &lt;/div&gt; 
  
     &lt;div class="gripper_h"&gt;&lt;/div&gt;
  
     &lt;div class="row"&gt;
         &lt;div class="window"&gt;&lt;/div&gt;
         &lt;div class="gripper_v"&gt;&lt;/div&gt;
         &lt;div class="window"&gt;&lt;/div&gt;
     &lt;/div&gt;
  
     &lt;div class="gripper_h"&gt;&lt;/div&gt;
  
     &lt;div class="row"&gt;
         &lt;div class="window"&gt;&lt;/div&gt;
         &lt;div class="gripper_v"&gt;&lt;/div&gt;
         &lt;div class="window"&gt;&lt;/div&gt;
     &lt;/div&gt; 
  &lt;/div&gt;
  </code></pre>
  
  <p>'window' elements are sortables. Grippers shouldn't be sortables. I've specified in the Sortable options:</p>
  
  <pre><code>{ items: '.window' }
  </code></pre>
  
  <p>But I'm seeing that windows are sorted over grippers while I drag, which I don't want to. I want grippers to be invisible to the Sortable.</p>
  
  <p>EDIT: Grippers are used to resize windows in both X and Y axis. With the given html code i will get this portlet.</p>
  
  <p><a href="http://img232.imageshack.us/img232/8275/portlet.png" rel="nofollow">PORTLET IMAGE</a></p>
  
  <p>The problem occurs when sorting between windows of the same row (".gripper_v")</p>