Chat site (with no login required)

Simple Chat website (No user login and user password required if possible) [1] logo at top belov logo [2] select button "male/famale" :: followed by "Username" label :: login rest is devided in 2 parts [3]? leftside =? chatrooms + [number of users chatting in room] [4]? Rightside =typical chat site text window ...if it is possible technically to have al label where username is written... it has to be checked somehow that 2 users dont have same username. But i have no idea if that is possible. Else you giht have a good sollution for it. Tell me if it can be done OR what your sollution would be. I really would like to have a really simple sollution. Thanks /jari