Hi, im using Fancybox (though any such script will do if needs be) and I have images aligned in a grid system - Along the top are dates and down the side users - at the moment i have it so that you can click on any photo and the lightbox loads and the next arrow takes you to the photos from the same date (ie down the grid)

What im looking for is the ability to have arrows left and right as normal but also up and down, meaning i can traverse the grid in all directions.

Anyone have any ideas? or think its even possible?