anchor.diff:    $jit.util.addEvent($jit.id('go_to_parent'), 'click', function() {
       treeMap.out();
     });
  -  
  +
   </script>
   
  
positive.code: </table>
  
  <script type="text/javascript">
    var json= {
      "id": "root", 
      "name": "<%= @heat_map.enquiry_type.display_name %>",
      "children": [<%= @heat_map.json %>]
    };
  </script>
    
  <script type="text/javascript">
  
    var extra_criteria = <%= @filter_by == 'none' ? 'false' : 'true' %>;
    $('.extra').css('display', '<%= @filter_by == 'none' ? 'none' : '' %>');
  
negative.code:     animate = !(iStuff || !nativeCanvasSupport);
    })();
  
    var json = {
      "id": "root", 
      "name": "<%= @heat_map.enquiry_type.display_name %>",
      "children": [<%= @heat_map.json %>]
    };
    
    // init TreeMap
    var treeMap = new $jit.TM.Squarified({
      injectInto: 'treemap-display',
  