title: Renaming a field in an object
body: <p>If I have the following object:</p>
  
  <pre><code>JsonObj = {
      "frames": {
          "cinema": {
              "sourceSize": { "w": 256, "h": 200 },
              "frame": { "x": 0, "y": 0, "w": 256, "h": 192 }
          },
          "tree": {
              "sourceSize": { "w": 128, "h": 110 },
              "frame": { "x": 0, "y": 302, "w": 70, "h": 96 }
          }
      }
  };
  </code></pre>
  
  <p>This JSON object is parsed into the variable <code>parsedJSON</code> using this JavaScript code:</p>
  
  <pre><code>var parsedJSON = JSON.parse(JsonObj);
  </code></pre>
  
  <p>How would I rename the "frames" property in <code>parsedJSON</code> to something else?</p>