JavaScript client for e-jabberd (Open Source chat server - chat client)

Below are open source chat server and client suitable for enterprise usage.

Chat Server : ejabberd
http://www.ejabberd.im/

Chat Client : jwchat
http://blog.jwchat.org/jwchat/

Below url explains how to configure ejabberd with jwchat.
http://www.ejabberd.im/jwchat-localserver