> I wish to only download the web pages that matches
> certain regular expression. Say, I want to ONLY
> download pages containing something like
> mm:dd:yyyy.

Err, with built-in options: no. This would require some coding, using an
external wrapper.

FYI, the "'check-link" wrapper is the good one:
'check-link' : int   (* myfunction)(char* adr,char* fil,int status);