I want to have this kind of look

http://kleankanteen.com/faqs/faqs.html

when i click the (+) button, the solution/answer will appear and

when i click the (-) button, the solution/answer will disappear

here is the sample that i want

please help..

i dont know if this is javascrip, ajax or something...

@ parry_kulk - thank you very much for the help... ^_^