Why not have your random link pick one of ten predetermined images, and preload all ten on the previous page.
You could recalculate which ten are the random set on a daily basis.
I might do it by daily creating a set of 10 symlinks to the actual randomly-chosen images in the /random/ directory, with the names of the symlinks being random1, random2 etc. The links would then stay the same, but the images underneath them would change daily.
--
simon
|