Some modules to look at.
LWP (methods and functions for fetching web pages)
HTML::TableExtract (Perl extension for extracting the text contained in tables within an HTML document.)
HTML::TreeBuilder (Parsing of HTML)

There are many many more. Try searching for "retrieving documents", "parsing html", etc. There are too many modules too list.
Hope this helps.

-Lee

"To be civilized is to deny one's nature."