title: connected list controls
body: <p>sorry for my English google translator. I have three connected lists</p>
  
  <pre><code>$( ".listaAvisosConectados" ).sortable({
      connectWith: ".listaAvisosConectados",
      dropOnEmpty:true,
  
      }).disableSelection();
  </code></pre>
  
  <p>Example online: <a href="http://test.vertudemo.com/" rel="nofollow">http://test.vertudemo.com/</a></p>
  
  <p>and I need to implement any element can be added on the red list but that list items can not be green or blue added in opposing lists. Red accepts all. Green only accepts green and blue only blue. </p>
  
  <p>I've tried several ways but cannot do it. </p>
  
  <p>If I put a different class to each list green and red. Red List and add two classes do not work very well. </p>