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               "image": "http://userserve-ak.last.fm/serve/300x300/8599099.jpg", 
               "$area": 198
             }, 
             "id": "album-On And On", 
             "name": "On And On"
           }, 
           {
             "children": [], 
             "data": {
               "artist": "Jack Johnson", 
               "playcount": "186", 
               "$color": "#B34B32", 
               "image": "http://userserve-ak.last.fm/serve/300x300/30082075.jpg", 
               "$area": 186
             }, 
             "id": "album-Brushfire Fairytales", 
             "name": "Brushfire Fairytales"
           }
         ], 
         "data": {
           "playcount": 384, 
           "$area": 384
         }, 
         "id": "artist_Jack Johnson", 
         "name": "Jack Johnson"
       }, 
       {
         "children": [
           {
             "children": [], 
             "data": {
               "artist": "Mother Love Bone", 
               "playcount": "349", 
               "$color": "#718D32", 
               "image": "http://userserve-ak.last.fm/serve/300x300/21881921.jpg", 
               "$area": 349
             }, 
             "id": "album-Mother Love Bone", 
             "name": "Mother Love Bone"
           }
         ], 
         "data": {
           "playcount": 349, 
           "$area": 349
         }, 
         "id": "artist_Mother Love Bone", 
         "name": "Mother Love Bone"
       }
     ], 
     "data": {}, 
     "id": "root", 
     "name": "Top Albums"
   };

  var tm = new $jit.TM.Squarified({
    //where to inject the visualization
    injectInto: 'infovis',
    //no parent frames
    titleHeight: 0,
    //enable animations
    animate: animate,
    //no box offsets
    offset: 0,
    //add cushion gradients
    cushion: useGradients,
    //duration of the animation
    duration: 1500,
    //Enable tips
    Tips: {
      enable: true,
      //add positioning offsets
      offsetX: 20,
      offsetY: 20,
      //implement the onShow method to
      //add content to the tooltip when a node
      //is hovered
      onShow: function(tip, node, isLeaf, domElement) {
        var html = "<div class=\"tip-title\">" + node.name 
          + "</div><div class=\"tip-text\">";
        var data = node.data;
        if(data.artist) {
          html += "Artist: " + data.artist + "<br />";
        }
        if(data.playcount) {
          html += "Play count: " + data.playcount;
        }
        if(data.image) {
          html += "<img src=\""+ data.image +"\" class=\"album\" />";
        }
        tip.innerHTML =  html; 
      }  
    },
    //Add the name of the node in the correponding label
    //This method is called once, on label creation.
    onCreateLabel: function(domElement, node){
        domElement.innerHTML = node.name;
        var style = domElement.style;
        style.display = '';
        style.cursor = 'default';
        style.border = '1px solid transparent';
        domElement.onmouseover = function() {
          style.border = '1px solid #9FD4FF';
        };
        domElement.onmouseout = function() {
          style.border = '1px solid transparent';
        };
    }
  });

  tm.loadJSON(json);
  tm.refresh();