Partially Modal Multi-Page Form

Hey there. I've been struggling with this for the last few hours, hopefully someone knows the answer. I've followed Kevin's Fancy Box modal tutorial, and I've got it working beautifully.

What I'd like to do however, is have the first page of a multi-page form inside the modal window, but on submit, I'd like the modal window to close, and I'd like to parent window to load a second page, passing the submitted variables from the modal form.

For example, the user clicks a link to select a specific product. The modal window is popped on the click, and prompts them for their zip code. When they hit submit, the modal window closes, and the parent window goes to the product configuration page, where the zip is passed to a hidden field.

I can see how the functionality could be done with a standard HTML form using onclick with the submit button. I've tried calling Fancy Box's close-window function in form_display.php (I think between lines 500 and 530, off the top of my head) but haven't had much luck.

I should add that right now, as I would expect because of my form 1 redirect settings, upon submitting the modal form, my 2nd page (the aforementioned product config page) loads inside the modal, rather than the parent with the modal closed.

Does anyone have any suggestions? Thanks.

Thanks,
Brad Kelly

Thanks for the response David! I like your assessment; using two forms and passing the values would probably be easier. I'll be sure to give that a shot.

Do you have any idea how I can show the second multi-page form in the parent window instead? It currently opens inside the modal window.

Also, might you have any suggestions on automatically closing the modal window upon submission? Normally I would use the submit button's onclick to do this, but because the form display code is shared and the whole form is called via php or a shortcode (instead of each element individually), I'm having a hard time locating where I can inject an instruction into the Gravity code to close the modal automatically and thus eliminate a click.

I understand this is borderline out-of-scope for you guys, but would appreciate any input on how I might accomplish this using Gravity Forms.

Thanks again for the quick response.
Brad

Thanks again for your help David. I was able to craft a solution that worked.