Chatbox for gaming website.

Hi i would like a chatbox making which will be able to be viewed on every page of our website something simalar to the one they have here [login to view URL] on this chat i would like it to be able to be set for different user ranks ie mods super mods and admins and for these groups to be able to mute or super mute a user from chatting on the chat box a super mute being permanant until removed a mute being a 30 min an hour etc not sure how much this will cost but cant be hard for an experianced proggrammer