Site to test pop-up blocking function "PopupTest"

Google ToolbarIt is a site to test whether various popup block function installed in etc etc works properly.

Various patterns are prepared, so you can see how far you can cope with your pop-up blocker function.
PopupTest - test your popup blocker software and download software
http://popuptest.com/

For details on the pop-up blocking function installed in Windows XP SP2, see below.

New features in Windows XP SP2, pop-up block overview

Microsoft Windows XP: Block pop-up windows with Internet Explorer

Firefox also has a popup blocking function.

Mozilla Japan Knowledge Base - Block pop-ups and allow

Opera can also popup block.

Opera browser: Features

Apple's browser "Safari" has a similar function.

Apple - Safari Reviewer's Guide - Block pop-ups

Apple - Safari - pop-up blocker