Exclude hidden pages from autonumbering

Hi there,

I have a form that spans around 10 pages and 6 of them are hidden so based on selection some of the pages will show. I have a page counter that is always displaying all the 10 pages. Like  Page 1 of 10 even though there are only 4 pages displayed. How can I get the correct count based on what's shown to the user.

Thanks