What it means JQUERY ? how to integrate it in Oracle APEX?

J Query is a cross-platform JavaScript library designed to simplify the client side scripting of HTML. J Query is a fast, small, and feature-rich JavaScript library. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers.

Integrating it into Apex is very common.,

For Brief open this link

"http://www.yenlo.nl/nl/oracle-apex-how-to-pimp-up-your-dialog-box-with-jquery/"

For Deatil,open this link

"https://www.youtube.com/watch?v=vNc7_Kvk6Zk"