Pop-up Blocker

A Pop-up Blocker is a program that prevents Pop-ups from being displayed in a user's Web browser. Pop-up Blockers work in a number of ways: some close the window before it appears, some disable the command that calls the Pop-up, and some alter the window's source HTML. Not all Pop-up Blockers can distinguish between an unwanted Pop-up window and one that is user-requested. Programs that can consistently do so are referred to as intelligent Pop-up Blockers.