"How to create a collapsible chapter/section list?" as seen on http://www.faqts.com/knowledge_base/view.phtml/aid/32027.
This does work on IE as well as W3C DOM browsers, and if scripting is disabled, fails safe: the full, expanded document will be shown.
It's an interesting approach, allowing you to work off any particular type of HTML tag (<h2>, here) to script structure into a "plain" document. The "expand all" and "collapse all" links are also scripted into place.
This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1. This is chapter 1.
This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2.
This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2. This is chapter 2.
This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3. This is chapter 3.