Web page took over Firefox

[Kipton Moravec]

Made a mistake and hit a link I should not have. It was the first one on
a google search.

http://www.geocities.com/sammiestuart22/woodenalphabetblocks/embesseling-money.html 

It popped up a message window asking to install "Antivirus 2008" and
would not let me close the Firefox window, change the URL, or cancel the
install window. I could not change to another tab. I could go to another
Firefox window.

While it looks like a Windows Virus, or something, how come it is able
to take over firefox and keep me from closing it or changing to a new
URL?

I thought Ubuntu helped prevent this crap from happening. 

I either have to find the process and kill it or reboot.

Is there a GUI way to stop it? I have 8.04 LTS.

Kip
-- 
Kipton Moravec KE5NGX
"Always do right; this will gratify some people and astonish the rest."
--Mark Twain