facebook-AJAX

  
/* LIKE */

FB.Event.subscribe('edge.create', function(href, widget) {
    alert('You just liked the page!');
});

/* FEED DIALOG FB.UI 
http://developers.facebook.com/docs/reference/javascript/FB.ui/
http://developers.facebook.com/docs/reference/dialogs/
http://developers.facebook.com/docs/reference/javascript/FB.Event.subscribe/
*/
FB.ui(
  {
    method: 'feed',
    name: 'Facebook Dialogs',
    link: 'http://developers.facebook.com/docs/reference/dialogs/',
    picture: 'http://fbrell.com/f8.jpg',
    caption: 'Reference Documentation',
    description: 'Dialogs provide a simple, consistent interface for applications to interface with users.'
  },
  function(response) {
    if (response && response.post_id) {
      alert('Post was published.');
    } else {
      alert('Post was not published.');
    }
  }
);

/* FEED DIALOG 
**   Note that the below example assumes that the user is already logged in and has authorized your application.
*/
    <div id='fb-root'></div>
    <script src='http://connect.facebook.net/en_US/all.js'></script>
    <p><a onclick='postToFeed(); return false;'>Post to Feed</a></p>
    <p id='msg'></p>

    <script> 
      FB.init({appId: "YOUR_APP_ID", status: true, cookie: true});

      function postToFeed() {

        // calling the API ...
        var obj = {
          method: 'feed',
          redirect_uri: 'YOUR URL HERE',
          link: 'https://developers.facebook.com/docs/reference/dialogs/',
          picture: 'http://fbrell.com/f8.jpg',
          name: 'Facebook Dialogs',
          caption: 'Reference Documentation',
          description: 'Using Dialogs to interact with users.'
        };

        function callback(response) {
          document.getElementById('msg').innerHTML = "Post ID: " + response['post_id'];
        }

        FB.ui(obj, callback);
      }
    
    </script>


/* FB ASYNC INIT 
http://developers.facebook.com/docs/reference/javascript/
*/

window.fbAsyncInit = function() {
    // init the FB JS SDK
    FB.init({
      appId      : 'YOUR_APP_ID', // App ID from the App Dashboard
      channelUrl : '//WWW.YOUR_DOMAIN.COM/channel.html', // Channel File for x-domain communication
      status     : true, // check the login status upon init?
      cookie     : true, // set sessions cookies to allow your server to access the session?
      xfbml      : true  // parse XFBML tags on this page?
    });

    // Additional initialization code such as adding Event Listeners goes here

  };