Help in running script

Help in running script

I found this old script, which would really help me resolve an issue I have:  http://andylangton.co.uk/blog/development/accessible-showhide-content-jquery.

I have never used Jquery, (JS or php). Have tried all I can think of (re -html side) but nothing works, it will not hide text, nor show, in fact it does nothing.

I know it's me, and think maybe I should be linking to something, but not sure what or how. Any help would be gratefully appreciated..

D)