// Place following code after FB.init call.

function onLogin(response) {
if (response.status == ‘connected’) {
FB.api(‘/me?fields=first_name’, function(data) {
var welcomeBlock = document.getElementById(‘fb-welcome’);
welcomeBlock.innerHTML = ‘Hello, ‘ + data.first_name + ‘!’;
});
}
}

FB.getLoginStatus(function(response) {
// Check login status on load, and if the user is
// already logged in, go directly to the welcome message.
if (response.status == ‘connected’) {
onLogin(response);
} else {
// Otherwise, show Login dialog first.
FB.login(function(response) {
onLogin(response);
}, {scope: ‘user_friends, email’});
}
});