JS general para tabs de Facebook.
<div id="fb-root"></div>
<script src="//connect.facebook.net/es_LA/all.js#xfbml=1"></script>
<script>
// Facebook instance
FB.init({
appId: Settings.facebook.appId,
status: true, // check login status
cookie: true, // enable cookies to allow the server to access the session
oauth: true, // enable OAuth 2.0
xfbml: true
});
// Handle tab height changes
FB.Canvas.setAutoGrow();
</script>