title: Gridster on_overlap_stop override
body: <p>I'm using a jquery plugin called Gridster.</p>
  
  <p><a href="http://gridster.net/" rel="nofollow">http://gridster.net/</a></p>
  
  <p>When initializing my grid I'm trying to set a callback for <code>collision.on_overlap_stop</code> however everytime I set it the program throws all kinds of errors in the gridster code.</p>
  
  <p>Has anyone else run into this problem?</p>
  
  <p>code example:</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
    var gridster;
  
    $(function(){
  
      gridster = $(".gridster ul").gridster({
          widget_margins: [10, 10],
          widget_base_dimensions: [140, 140],
          draggable: {
              stop: function(event, ui)
              {
                   //code...
              }
          },
          collision:
          {
              //this function doesn't seem to be called and when this function is set the page crashes.
              on_overlap_stop: function(collider_data)
              {
                   //code....
              }
          },
      }).data('gridster');
    });
  &lt;/script&gt;
  </code></pre>