Javascript Scope problem with OAuth

I was wondering how to call waitForPin in this line:

setTimeout(this.waitForPin, 100);

File:

// namespace our code
window.App = {};

// my class (no Class.create in JQuery so code in native JS)
App.Something = function() {
};

// add functions to the prototype
App.Something.prototype = {

    // automatically called
    initialize: function(name, sound) {

        this.wnd;

        this.config = {
            // some vars
        };

        this.oauth = new OAuth(this.config);

        // attach eve开发者_运维问答nt handlers, binding to 'this' object
        $("#request_token").click($.proxy(this.request_token, this));

    },

    request_token: function() {
        this.oauth.fetchRequestToken(this.openAuthoriseWindow, this.failureHandler);
    },

    openAuthoriseWindow: function (url) {
        this.wnd = window.open(url, 'authorise');
        setTimeout(this.waitForPin, 100); // how to call waitForPin here?
    },

    waitForPin : function (scope) {
        // do sth
    }

};

setTimeout(window.App.Something.waitForPin(scope), 100);

The waitForPin function is attached to the prototype of Something. In order to access it create an instance of Something and call the method on that instance. Example

setTimeout((new App.Something()).waitForPin, 100);

setTimeout(this.waitForPin, 100);

That's the correct way to do it.

var Q = new App.Something;
Q.openAuthoriseWindow();

Demo: http://jsfiddle.net/bBRPv/

What about this:

setTimeout($.proxy(this.waitForPin, this), 100);