sample.html

    <!-- include the data file. This dumps everything into a JS variable called 'data' -->
    <script src="/data/genres.js" type="text/javascript"></script>
  
    <!-- print out some trivial data to show that it's loaded -->
    <script>
      $('container').update("Total count from trackdata is: " + 
                             data.trackdata.total +  
                             " <br />and total count from listendata is: " + 
                             data.listendata.total);
    </script>