Add Test For Hidden Form Field

I need to add a text field to a standard formmail script, e.g., Matt's latest formmail or a clone. The field entry box on the form page should be hidden by CSS. The script should check to see if the field is blank; if the field is not blank, the script should load the confirmation page but send no mail. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). Deliverables: 1) Perl modification necessary to test for hidden field and end processing if not blank; may be delivered as several lines of code with insert instructions or as a modified formmail script. We can provide unmodified script if desired. 2) HTML code for text box input. 3) CSS to hide the text box input from browsers. ## Platform Perl running on LAMP server.