does anyone know how to make four arrays for the next and previous button?

Hello,

I am trying to get 4 sets of thumbnails (each set in a hidden div tag) to onClick show in a main picture box. The links to the hidden divs are just below the main picture box. I can get everything to work, but my problem is when the next and previous are clicked ALL pictures are shown.
What I would like is when the first set of thumbnails comes up, the big picture will only scroll through the first set of large pictures...etc. .....