Applescript for chatroom disconnect

[Stiffler's Mom]

Where can I find some documentation on xmpp?

Specifically, I'm looking for scripting a disconnect from a chatroom ('Group Chat')

You can script joining like this:
tell application "Adium"
GetURL "xmpp://funroom@conference.im.mydomain.com?join"
end tell

But what about disconnecting? Is there a similar command? Ideas?