Page numbering on dynamic form

I'm creating a form that is actually a combination of several different documents. My experience with javascripting is very minimal.
 
The first document is 6 pages which can dynamically increase depending on content. The user wants the page numbering to be x of y format but the total page count would only be for the first form in the document.
 
Then there is a second form that needs to have the numbering restart at 1 and count the total number of pages for that document. This one is also dynamic and can change in length.
 
So the first 6 pages would be page 1 of 6, 2 of 6, etc.
Then the 7th page would be page 1 of 2
The 8th page would be page 2 of 2, etc.
These are followed by about 10 more pages that are not numbered.
 
I can't figure out how to make the page count appear for each subform separately. I do have separate master pages for each form if that helps.
 
Thanks,
Stacey