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 event 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 } };

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