how to read json file in google api

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how to read a .json file in google api,,,
iam not able to read a file,, please guide me fast...
the below is the code

<script type="text/javascript" src="http://www.google.com/jsapi"></script>
  <script type="text/javascript">
      google.load('visualization', '1', { packages: ['table'] });
  </script>
  <script type="text/javascript">
      function drawVisualization() {
          // Create and populate the data table.
          var JSONObject = JSONObject.setJSONUrl("data.json"); ;
         var data = new google.visualization.DataTable(JSONObject, 0.5);
          // Create and draw the visualization.
          visualization = new google.visualization.Table(document.getElementById('table'));
          visualization.draw(data, { 'allowHtml': true });
      }
      google.setOnLoadCallback(drawVisualization);
  </script>

and the json data in file is :

{cols: [{ id: 'task', label: 'Task', type: 'string' },{ id: 'hours', label: 'Hours per Day', type: 'number'}],rows: [{ c: [{ v: 'Work', p: { 'style': 'border: 7px solid orange;'} }, { v: 11}] },{c: [{ v: 'Eat' }, { v: 2}] },{ c: [{ v: 'Commute' }, { v: 2, f: '2.000'}]}] }