window.self.close()

[Bert Randolf]

oh mann:

http://www.google.com/search?q=Scripts+may+not+close+windows+that+were+not+opened+by+script&sourceid=mozilla-search&start=0&start=0&ie=utf-8&oe=utf-8 -> 2.ter treffer:
http://blogs.msdn.com/lisawoll/archive/2004/09/17/231078.aspx
ganz unten:
"in firefox, you need to turn on the "pref("dom.allow_scripts_to_close_windows", false);" option in (normally) C:\Program Files\Mozilla Firefox\greprefs\all.js"

man google

Bert