I've heard great things about Gravity Forms and I know my client will love it. Before purchasing I need to check something's possible though.
If you'd be so kind as to look at this form: http://www.appealshading.com/contact/brochure-request/ (currently a custom form which I want to port to GF).
Near the bottom there's a "How did you hear about us" dropdown. Choosing an item from this menu causes a secondary menu to appear with the child options within. If the user selects "Other" in the child form, it causes a textbox to appear underneath to specify the referrer.
Is this all possible using Gravity Forms? I can code so if a bit of custom hacking is necessary (maybe with some guidance from those who know the API) I'm not too bothered.
My main concern is the validation of the menu, e.g. making sure a selection is made in both menus, and making sure the "Other" box is filled in when applicable.
Any answers would be much appreciated. If the answer is "yes" then you can have my money :-)