ACL construction

Hi,
What acl would I use to block/match subpages of a domain but not the top
level?
eg match (so I can block it) www.seven.com.au/chat/index.asp

but not match (and so allow) www.seven.com

thanks, I have been working at this for ages now!

Cheers,

--
Simon Bryan                    sbryan@olmc.nsw.edu.au
Information Technology Manager sbryan@mpx.com.au
OLMC Parramatta