Push notification to web applications

Here are some pointers on various options.

• Long polling
• Server sent events
• Web sockets

Links

http://dsheiko.com/weblog/websockets-vs-sse-vs-long-polling/

http://www.html5rocks.com/en/tutorials/eventsource/basics/

http://html5doctor.com/methods-of-communication/

https://www.quora.com/How-do-you-push-messages-back-to-a-web-browser-client-through-AJAX