I like your effort to make a Bananalbum like skin in HTML5, thanks!
I alway test stuff to the limits, and i like to be able to press and hold an arrow key to quickly go though images.
That works fine in Bananalbum, try it in this sample album: http://www.bananalbum.com/albums/Going-places/
Go there and press and hold right arrow (release at some point)
It correctly moves through all images at the speed at which the button is triggered.