Php Java Script HELP!

Ok,

I hate to beg but. . . .

I have a php based forum which I really like and my users love. One thing they ask for is the ability to click on a smiley and have it insert in the message, like you can do on this forum.

I have been trying to do this for months. I have the java script, or at least I think I do, I just don't know how/where to integrate it into my php forum.

Is there anyone out there that wants to take on this task? I can't believe it would take long, I just simply haven't been able to figure it out.

Thanks,

Rich