title: jqueryui draggable question: how to drag multiple elements at the same time?
body: <p>Let's say I have something set to be dragged:</p>
  
  <pre><code>&lt;div class="container"&gt;
    &lt;div id="draggable-1"&gt;&lt;/div&gt;
    &lt;div id="draggable-3"&gt;&lt;/div&gt;
    &lt;div id="draggable-4"&gt;&lt;/div&gt;
    &lt;div id="draggable-5"&gt;&lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Is it possible to set jqueryui's draggable api so I can drag multiple draggable elements at the same time? 
  Thanks. </p>