I have a JsFiddle here, and added Microsoft AJAX to be loaded through external JS/resource section. How can I tell whether or not my JS code is run after the AJAX file has finished loading?

Seems that the AJAX does not load either. :(

Here is the code in the JSFiddle:

Type.registerNamespace(Tutorial.Chapter1);

Tutorial.Chapter1.Person = function(firstName, lastName) {

    this._firstName = firstName;

    this._lastName = lastName;

};

Tutorial.Chapter1.Person.prototype = {

        set_firstName: function(value) {

            this._firstName = value;

        },

        get_firstName: function() {

            return this._firstName;

        },

        set_lastName: function(value) {

            this._lastName = value;

        },

        get_lastName: function() {

            return this._lastName;

        },

        _firstName: ,

        _lastName: ,

        displayName: function() {

            alert(Hi!  + this._firstName +   + this._lastName);

        }

    };

Tutorial.Chapter1.Person.registerClass(Tutorial.Chapter1.Person, null);