In another thread [The answer to Spam ? Maybe YES] Danny suggested I look at PopUp Zapper from batista.org/zap/.
This is good, but I am a cheapskate (and not even from the North).
If you go to
www.webwasher.com, their anti pop up is excellent, free and works with Macs , Netscape 7, Opera 5 and that MS thing.
PS. Regarding the brackets above; Never ask a man if he is from Yorkshire. If he is he willl tell you soon enough (about 45 seconds in), if not why insult the man ?