Smiley faces

[bear]

I'm building a website that will have a forum board on it. I need to know how to set up my forum so that when a user types a emoticon like this ----> :-)
in the forum text area it will display a smiley image on the forum board. If anyone can help I sure would appreciate it.

[bear]

Sorry about that Dave, I knew it was some kind of script that would do what I need but was not sure what type......