VirusDoctor from another site--may or may not be detected/infected

Hey,

 

I was just reading online when a window popped up for Virus Doctor. The schema was Windows 2000/XP and I clicked 'X' on each of the pop-ups including the one asking for a download. This then shut down my browser, Firefox (latest version.) I have NIS2008 and it was updated today before the intrusion.

 

I thought I had all the blocks correctly configured for NIS, so any idea how this happened? I ran a full-system scan and it detected nothing--am I free from this Malware or could it still be lurking on my computer?

 

I also checked out the virus defition for Virus Doctor here on Symantec;however the picture didn't line up with what I saw, maybe because I stopped it right away. I also opened up the History in Firefox and apparently I got this window from the following addresses:

 

Addresses are as follows, without the spaces: 

 

Name: VirusDoctor-Online Protection

http:// scanner.av-best.info/scan.php?campaign=mmb_11761620791&landed=4

 

Name: paramss=sbbOnK6ruq2elZejsZja0tCYo9fdzLjD4dLAmJilqJyU --

http:// run.av-best.info/ paramss=sbbOnK6ruq2elZejsZja0tCYo9fdzLjD4dLAmJilqJyU

Name: install.php (in twice)
http:// download.av-best.info/install.php?campaign=mmb_11761620791&country=en&coun…
That was all I could read in the history menu
 

 

Am I infected?