jQuery Ping domain/ip with Deferred

addon.js

/* 
Ping 
*/
$.extend($, {
	Ping: function Ping(url, timeout) {
		timeout = timeout || 1500;
		var timer = null;

		return $.Deferred(function deferred(defer) {

			var img = new Image();
			img.onload = function () { success("onload"); };
			img.onerror = function () { success("onerror"); };  // onerror is also success, because this means the domain/ip is found, only the image not;

			var start = new Date();
			img.src = url += ("?cache=" + +start);
			timer = window.setTimeout(function timer() { fail(); }, timeout);

			function cleanup() {
				window.clearTimeout(timer);
				timer = img = null;
			}

			function success(on) {
				cleanup();
				defer.resolve(true, url, new Date() - start, on);
			}

			function fail() {
				cleanup();
				defer.reject(false, url, new Date() - start, "timeout");
			}

		}).promise();
	}
});

example.js

/* example */
$.Ping("http://google.com" /*, optional timeout */).done(function (success, url, time, on) {
	console.log("ping done", arguments);
}).fail(function (failure, url, time, on) {
	console.log("ping fail", arguments);
});

This is not working when I send ping request to 8.8.8.8 IP address.