Thanks a lot Monks!!
Just to make clear why I need al this: I wrote this cgi-script that manages a database.
It allows one to add information into it and retrieve it back (via a search form). Adding useful information goes via a form too and might contain HTML just like this one. So when you post something like:

a href = my_word document.doc ... etc

With a post containing a word document I like to be able to read this document and be able to create the search-keywords for that post
But my impressions is, is that this is not so easy!!
Luca