Browse image@book google's style

for my document indexing, i have to handle a lot of images generated from PDF file. thinking to develop web viewer as user friendly as it can. 

google docs & picasaweb give me some rough idea..

i'm thinking of:

• load low res/thumbnail before loading actual image.
• loading image message.
• priority loading page/section requested by user.
• background images loading n cache.

working demo can be view here.

next version will include javascript image object call. that will cache image for faster loading.