1.websites use html protocols and in some cases support via other add ins other things like java, etc.. however, in general websites do not support the protocol used for IRC Chats. you would have to run your own IRC Server (IRCD running on a unix box), and then use a java chat script to point the users to that server. Having said all this, this is not a question for the mIRC message boards, since mIRC is a CLIENT to talk to IRC servers, not websites.
Hope this helps (a little)