feature request -- link to next photo in folder in "display photo" page

Hi, Thanks for photo.net ! Can you put a "previous" and "next" link on

the "display photo" page. This will definitely also reduce load on the

servers and save bandwidth since the "display folder" will be used

less. I am assuming that people will want to spend more time on

folders with more pictures that they want to see and so will probably

want to see all of them. This requires a single additional select/sort

per request. Thanks.