anchor.diff:      });
     };
   
  -  (function(d, s, id){
  -     var js, fjs = d.getElementsByTagName(s)[0];
  -     if (d.getElementById(id)) {return;}
  -     js = d.createElement(s); js.id = id;
  -     js.src = "//connect.facebook.net/en_US/sdk.js";
  -     fjs.parentNode.insertBefore(js, fjs);
  -   }(document, 'script', 'facebook-jssdk'));
  +// Now that we've initialized the JavaScript SDK, we call
  +  // FB.getLoginStatus().  This function gets the state of the
  +  // person visiting this page and can return one of three states to
  +  // the callback you provide.  They can be:
  +  //
  +  // 1. Logged into your app ('connected')
  +  // 2. Logged into Facebook, but not your app ('not_authorized')
  +  // 3. Not logged into Facebook and can't tell if they are logged into
  +  //    your app or not.
  +  //
  +  // These three cases are handled in the callback function.
   
  -  FB.login(
  -    alert("logged in!"))
  +  FB.getLoginStatus(function(response) {
  +    statusChangeCallback(response);
  +  });
  +
  +  };
  +
  +  // Load the SDK asynchronously
  +  (function(d, s, id) {
  +    var js, fjs = d.getElementsByTagName(s)[0];
  +    if (d.getElementById(id)) return;
  +    js = d.createElement(s); js.id = id;
  +    js.src = "//connect.facebook.net/en_US/sdk.js";
  +    fjs.parentNode.insertBefore(js, fjs);
  +  }(document, 'script', 'facebook-jssdk'));
  +
  +  // Here we run a very simple test of the Graph API after login is
  +  // successful.  See statusChangeCallback() for when this call is made.
  +  function testAPI() {
  +    console.log('Welcome!  Fetching your information.... ');
  +    FB.api('/me', function(response) {
  +      console.log('Successful login for: ' + response.name);
  +      document.getElementById('status').innerHTML =
  +        'Thanks for logging in, ' + response.name + '!';
  +    });
  +  }
   </script>
   
   <!--
  
positive.code:   the FB.login() function when clicked.
  -->
  
  <fb:login-button scope="public_profile,email" onlogin="FB.login();">
  </fb:login-button>
  
  <div id="status">
  
negative.code: <script>
  // This is called with the results from from FB.getLoginStatus().
    function statusChangeCallback(response) {
      console.log('statusChangeCallback');
      console.log(response);
      // The response object is returned with a status field that lets the
      // app know the current login status of the person.
      // Full docs on the response object can be found in the documentation
      // for FB.getLoginStatus().
      if (response.status === 'connected') {
        // Logged into your app and Facebook.
        testAPI();
      } else if (response.status === 'not_authorized') {
        // The person is logged into Facebook, but not your app.
        document.getElementById('status').innerHTML = 'Please log ' +
          'into this app.';
      } else {
        // The person is not logged into Facebook, so we're not sure if
        // they are logged into this app or not.
        document.getElementById('status').innerHTML = 'Please log ' +
          'into Facebook.';
      }
    }
  
    // This function is called when someone finishes with the Login
    // Button.  See the onlogin handler attached to it in the sample
    // code below.
    function checkLoginState() {
      FB.getLoginStatus(function(response) {
        statusChangeCallback(response);
      });
    }
  
    window.fbAsyncInit = function() {
      FB.init({
        appId      : '109878109412996',
  