The Singleton Pattern

var Application = window.Application || {}; // Creates a namespace called Application.

Application.Config = function () {
    var instance = (function () {
        var privateVar;

        function privateMethod() {
            return 'privateMethod';
        }

        return { // Public interface.
            publicMethod: function () {
                return privateMethod();
            }
        }
    })();

    Application.Config = function() {
        return instance;
    }

    return Application.Config();
}