How to prevent pop-up ads?

Does anyone know of a way to prevent pop-up ads? It's really annoying, some websites are OK since the ads are IN their page but some websites have pop-up ads. I can close these pop-up ads only to have them pop back up when I surf to a new page on the website. If I don't close the pop-up ad, it's OK but it's really irritating.

Oh, and another question, I'm using Windows XP, it automatically groups the IE browser windows when it exceeds displayability on the Taskbar. Does anyone know how to ungroup the windows? I only know it work if I place the Taskbar vertically instead of the default horizontal.

OK, thanks!!

proxomitron. works like a charm.

http://www.flaaten.dk/prox/

I think spyblocker does it too.

http://personal.atl.bellsouth.net/mia/k/r/kryp/sb.htm

Thanks Ganjica! I'll look at them now!! :)

Pop-ups --> Proxomitron, as Ganjica stated.

Ungroup IE-windows --> Right-click your TaskBar --> Properties --> Uncheck 'Gelijksoortige Knoppen Gegroepeerd weergeven' (I use a Dutch version, but I'm sure you're smart enough to find out what I'm talking about...)

You can also disable java script but that will get to be a pain in the ass after a while. Go with the proxomitron.

AH!! Thanks Negative!!! Finally!! I'm really happy about this :D

Yep tryed the early ones they worked

ZeroOne has made a threat with his new proxomitron filter... Check it out here .

Hey , Opera has pop up stopper too !