costas - 2005-03-13

I just started using php fantastico forms and must admit I am thrilled and faced very few problems till now. I guess beginners or ignorant luck. I am using the form(s) in their vary basic style without database saving for now, until I sort out security issues. They work fine. But I do have one problem:
In one instance I use the forms to get replies to customers advertisements. I only have one form for this purpose and many ads. Although I request the ad number as one of the entries many users prefer to ignore it and use the box for anything they like. How can I place a command to the forwarding page that will add the ad number as a hidden (or visible) information with the submitted form. I suspect that this can be done with javascripts. Any suggestions?
Thank you
Costas