He Ernie,
what do you think about a little improvement on the navigation frame to display an Icon with the content type of the file it is referencing?
If it's an html page to be displayed we show a page as is now. If it is a PDF we display a PDF icon, word a word icon... so the user knows what he the next element will be.
Also one question: Is it possible for an item in the manifest to reference a URL in the internet instead of a resource?
Greetings,
Nima