Authentication Facebook login page

Facebook helps you simplify and enhance user registration and sign-in by using Facebook as your login system. Users no longer need to fill in yet another registration form or remember another username and password to use your site. As long as the user is signed into Facebook, they are automatically signed into your site as well. Using Facebook for login provides you with all the information you need to create a social, personalized experience from the moment the user visits your site in their browser.

Facebook Platform uses OAuth 2.0 for authentication and authorization. While you can add login to your site using OAuth 2.0 directly (see our Authentication Overview), the open source JavaScript SDK is the simplest way to use Facebook for login. more... click here