Need to know when a webpage has been changed

Any online service which informs you when a page updated?

[litmania com]

I know that IE has a sychronize feature, but is there any online service which can inform me when a webpage has been updated?

One of the affiliate programs I am a part of, WHSmith, has a page with news for affiliates but of course they don't bother to inform us when it's updated and so I waste my time checking it everyday :)

Thanks...

[bill]

NetMind has a tracker called [url=mindit.netmind.com]Mind-it[/url] that will notify you when certain pages change.

[litmania com]

Thank you very much Bill :)