gistfile1.js

//have to include http://127.0.0.1:3333/faye.js in the html file

var client = new Faye.Client('http://127.0.0.1:3333/faye', { timeout: 120 });
var subscription = client.subscribe('/notifications/channel', function(message) {
  alert(message.text);
});


//or with user_id as a channel

Badgeville.bind('afterSetUser', function() {
  var client = new Faye.Client('http://127.0.0.1:3333/faye', { timeout: 120 });
  var subscription = client.subscribe('/notifications/' + Badgeville.Settings.user.id, function(message) {
      alert(message.text);
  });
})