No-refresh web pages

Hello, this is my first post on BHW, and I find most things here extremely useful as I'm just starting out. Hope to be contributing soon to the community once I devise my own original Black Hat methods.

Anyway, just a simple question: how are no-refresh web pages created, e.g. Facebook? That is to say when you perform a function (say, submit a comment form), the form submits on the page itself without reloading and then displays as a plain text entry uploaded into the database.

What scripting languages are required to build no-refresh applications? I can code in PHP, but it seems that PHP requires refreshing for functions to be performed.

Thanks a lot.

Hey.

Ajax is a scripting language that will give you what you're looking for.

-Fr3shY

Ajax and javascript.

Ajax definitely - but ajax is not a programming language it is more of a protocol.

I use javascript to make an ajax call to php on my server. Search google.

w3schools dot com has the best best explanation of the basics of AJAX imo.