UNIX for Dummies Questions & Answers

Hello: I have a web domain hosted at 1and1.com. They provide a rudimentary chat program, but it's very basic, and froze up last evening (continuing on into this morning).

Can anyone recommend a jave (javascript; php; http) -based standalone chat program, that I can embed (or link) into an html page at my site?

I've looked (briefly) at CourceForge, but there are too many choices ... I'm interested in specific recommendations, pro or con.

Thanks, appreciated - Greg :-)