TreeDoc demonstrates a novel way to display
hypertext and view documents, and provides free
code for beginners to easily create such displays
in HTML. The live demo at TreeDoc.org shows a
"tree-control document," in which links are opened
and closed in the middle of the calling page,
right below the link, instead of on a new page.
This lets you open a document's sections,
subsections, definitions, etc. just as you would
open subfolders in a "tree control." The pages are
still 99% HTML, but with a couple encapsulated PHP
functions (similar to link tags), so TreeDocs are
as easy to create as ordinary Web pages.
