Facebook Like Button Google Analytics

ga-facebook.js

// This assumes Facebook buttons are using the Facebook Javascript SDK.
// Thanks to Google for most of this code, see the Social Interaction Analytics guide at 
// https://developers.google.com/analytics/devguides/collection/gajs/gaTrackingSocial

// Facebook provides a Javascript event framework that allows you to subscribe to events 
// happening within the Facebook Javascript SDK and provides data accordingly.

// To track a like, subscribe to the edge.create event and then use the callback to 
// execute the Analytics tracking code:

FB.Event.subscribe('edge.create', function(targetUrl) {
  _gaq.push(['_trackSocial', 'facebook', 'like', targetUrl]);
});

// To track an unlike, subscribe to the edge.remove event and then use the callback to 
// execute the Analytics tracking code:

FB.Event.subscribe('edge.remove', function(targetUrl) {
  _gaq.push(['_trackSocial', 'facebook', 'unlike', targetUrl]);
});

// To track a share, subscribe to the message.send event and then use the callback to 
// execute the Analytics tracking code:

FB.Event.subscribe('message.send', function(targetUrl) {
  _gaq.push(['_trackSocial', 'facebook', 'send', targetUrl]);
});