jquery.ajax.progress.js

// Forked: https://gist.github.com/nitriques/6583457
	(function addXhrProgressEvent() {
		var originalXhr = $.ajaxSettings.xhr;
		$.ajaxSetup({
			progress: $.noop,
			upload: $.noop,
			xhr: function () {
				var self = this;
				var req = originalXhr();
				if (req) {
					if ($.isFunction(req.addEventListener)) {
						req.addEventListener('progress', self.progress, false);
					}
					if (!!req.upload && $.isFunction(req.upload.addEventListener)) {
						req.upload.addEventListener('progress', self.upload, false);
					}
				}
				return req;
			}
		});
	})();