How do facebook functions work?

Question

I want to understand how facebook notifications work. When someone likes your messages, comments, sending messages, etc., Facebook sends a notification as soon as it is done. I want to know if there is any server side script or events triggered when users click a button, messages, send messages, etc. I need to know how to implement something like this using jquery and php to use on my wbsite.

Answer 1

This is done using push events: http://en.wikipedia.org/wiki/Push_technology