jzChat is an 100% HTML/JavaScript chatroom performed by a java servlet. Guest users just have to enter a nickname for chatting. They can choose chat's look&feel. Private messages are allowed. Root user chooses chatroom's name and subject. Root also controls the chatroom: max. users, open, close, transcript, list or kickoff users features are available. jzChat is protected against cross scripting attacks. Only root user could use "direct-HTML". Note that this chat doesn't need frames to run.