Generating OpenTok Token in Javascript

token.html

<script src="http://code.jquery.com/jquery-1.8.3.min.js" type="text/javascript"></script>
<script src="https://raw.github.com/carlo/jquery-base64/master/jquery.base64.min.js" type="text/javascript"></script>
<script src="http://crypto-js.googlecode.com/svn/tags/3.0.2/build/rollups/hmac-sha1.js"></script>
<script type="text/javascript">
  var secondsInDay = 86400;

  // Credentials
  var apiKey = '<apiKey>';
  var secret = '<secret>';
  var sessionId = '1_MX4xMTMzMTg5Mn4xMjcuMC4wLjF-U3VuIERlYyAwMiAwNjo0NTozMSBQU1QgMjAxMn4wLjQwMjY2OH4';

  // Token Params
  var timeNow = Math.floor(Date.now()/1000);
  var expire = timeNow+secondsInDay;
  var role = "publisher";
  var data = "bob";

  TB.setLogLevel(TB.DEBUG);

  // Calculation
  data = escape(data);
  var rand = Math.floor(Math.random()*999999);
  var dataString =  "session_id="+sessionId+"&create_time="+timeNow+"&expire_time="+expire+"&role="+role+"&connection_data="+data+"&nonce="+rand;

  // Encryption
  var hmac = CryptoJS.algo.HMAC.create(CryptoJS.algo.SHA1, secret);
  hmac.update( dataString );
  hash = hmac.finalize();

  preCoded = "partner_id="+apiKey+"&sig="+hash+":"+dataString;
  token = "T1=="+$.base64.encode( preCoded )
  // Token Achieved. The End
</script>