Answer by David for JavaScript: Add delay to a jquery ajax retry

The context of this has changed by the time that retry() function executes, and is no longer the AJAX info. You should, however, be able to wrap it in a closure by using a variable:

var self = this;
var retry = function () {
    $.ajax(self);
};

(Note that this whole context is itself also happening in a callback, error. So if this still isn't what you need it to be, you may need to apply this same concept another scope higher.)