diva.js

"Diva.js (Document Image Viewer with AJAX) is a Javascript frontend for viewing documents, designed to work with digital libraries to present multi-page documents as a single, continuous item. Only the pages that are being viewed at any given time are actually present in the document, with the rest appended as necessary, ensuring efficient memory usage and high loading speeds.

Written as a jQuery plugin, diva.js requires the jQuery Javascript library. Diva's back end is constituted by the IIPImage server."

http://ddmal.github.io/diva.js/

https://github.com/ddmal/diva.js

http://iiif.io/apps-demos/