Simple Show / Hide Paragraph (NEED HELP!)

Simple Show / Hide Paragraph (NEED HELP!)

Hi Im trying to figure out how this site does their faq's EXACTLY:
http://support.brightcove.com/en/knowledge-base

So you click on the question and the answer appears below.

Can someone send me the exact way to do it, javascript to use, and html easy sample that i can replace with my text. (copy/paste)

Thank u!