Are you referring to something like an imagemap in HTML? To send the x,y coordinates via a GET/POST to a webserver? I'll try to help you (as will many many others) if possible, just trying to understand the question. Please be specific, it will help a lot!

<pedantic>Perl PM modules is redundant (I'm assuming you mean PM as in .pm not PM as in PerlMonks). They're simply referred to as Perl modules :)</pedantic>