window.fbAsyncInit = function() {
    FB.init({appId: TzFBData.AppID, status: true, cookie: true, xfbml: true});
    FB.Event.subscribe('auth.login', function(response) { window.location.reload(); });
};

var TzFB = function() {
    var init = function() {
        var oBtn = document.getElementById('TzFB');
        if (oBtn) {
            addEvent(oBtn, 'click', api.login);
        }
    }

    var api = {
        login: function() {
            FB.login(function() {}, {perms: TzFBData.ext_perms});
        }
    };


    addEvent(window, 'load', init);
    return api;
}();