/**
* main js file behind the operating of facebook sharer
*/
window.fbAsyncInit = function() {
                FB.init({appId: '320880477956473', status: true, cookie: true, xfbml: true});
                /* Change the application id with the one you are provided by facebook after you create the application there */  
                /* All the events registered */
                FB.Event.subscribe('auth.login', function(response) {
                    // do something with response
                    login();
                });
                FB.Event.subscribe('auth.logout', function(response) {
                    // do something with response
                    logout();
                });
 
                FB.getLoginStatus(function(response) {
                    if (response.session) {
                        // logged in and connected user, someone you know
                        login();
                    }
                });
            };
            (function() {
                var e = document.createElement('script');
                e.type = 'text/javascript';
                e.src = document.location.protocol +
                    '//connect.facebook.net/en_US/all.js';
                e.async = true;
                document.getElementById('fb-root').appendChild(e);
            }());
 
            function login(){
                FB.api('/me', function(response) {
                    document.getElementById('login').style.display = "block";
                    document.getElementById('login').innerHTML = response.name + " succsessfully logged in!";
                });
            }
            function logout(){
                document.getElementById('login').style.display = "none";
            }