Disable pop-up features

Just wondering, I keep seeing more and more ISPs offering "We eliminate pop-up ads" and the like.

I was wondering how they are doing this? I know that people can disable javascript in their browsers, but this feature seems to allow for normal js execution while disabeling pop-up.

I can only guess they do this by not invoking the window.open() method, but what if you want to open a new window for navigational purposes? (ie target="_blank" in an <a> tag).

Just wondering.

they are just going to give you a popup blocker that runs in the system tray.

or they supply you with opera and disable popup windows, i can disable popup windows in opera so can other opera users.
File > Quick Preferences > Refuse pop-up windows

scroots

...or they just include a free program from www.download.com :D

I would have to agree with zoobie...

Most browsers today (except for MS browsers) block pop-ups. It basically doesn't allow javascript to open a new window, unless it's part of an onclick event.