title: Draggable revert if outside this div and inside of other draggables (using both invalid and valid revert options)
body: <p>On ui draggables ( <a href="http://jqueryui.com/demos/droppable/#revert" rel="noreferrer">http://jqueryui.com/demos/droppable/#revert</a> ) is it possible to revert a div if its inside one div and if not inside another one? for example like this </p>
  
  <pre><code>$( "#draggable" ).draggable({ revert: "valid", revert:"invalid" });
  </code></pre>
  
  <p>but that wouldn't work because of obvious reasons.. can I condition that though?.. for when its inside this droppable and not inside of that droppable?</p>