gistfile1.js

<script type="text/javascript">
function doLogin(doneUrl) {
 /* Tell XAuth.org that a user has just signed into Google on this browser. */
 XAuth.extend({
   // reveals "someone is logged into Google"
   token: "1",
   // Expires after 24 hours or if the user explicitly logs out
   expire: new Date().getTime() + 60*60*24*1000,
   // Allow any domain to read this info (could also be a whitelist of partners)
   extend: ["*"],
   // Optional callback function once extend() has completed.
   callback: makeRedirectFunc(doneUrl)
 });
}
</script>

<script type="text/javascript">
XAuth.retrieve({ 
  retrieve: ['xauth.org', 'googxauthdemo.appspot.com', 'xauthdemo.mslivelabs.com'], 
  callback: receiveTokens } 
);
</script>

<script type="text/javascript"> 
function receiveTokens(responseObj) {
 var tokens = responseObj.tokens;
 var token = tokens['xauth.org'];
 var partners = {}; 
 var tokensFound = false; 
 if (tokens['googxauthdemo.appspot.com']) { 
   partners['google'] = true; 
   tokensFound = true; 
   var status = document.getElementById('status-google');
   status.innerHTML = 'Signed In!';
   status.style.color = '#0A0'; 
 } 
}
</script>