Looking for a webPage Preloader Mod

I need a webpage preloader with a nice looking progress bar or animation for my dolphin site.  The preloader must perform loading task before displaying any of the webpage's content, and only when all images have been loaded will it then display the webpage.  This preloader can work several ways, not sure if I have a preference at this time:

Either load specific images...
or load images in a specific directory...
or only load images used on the page it is opening...
or load all images from the entire site.

I would like to have this preloader work on any page, or at least all profile pages, as I will have visitors come to the site from different profiles/landing pages, and not always from the root domain/index page.

If anybody knows of a mod out there, please do share.

Thanks,
-Zehn-