Dynamic HTML Overview

HTML:  http://msdn.microsoft.com/en-us/library/bb250397(VS.85).aspx

The Microsoft Developer Network's introduction to DHTML.

Dynamic HTML, the Definitive Reference

Author: Danny Goodman Publisher: O'Reilly, August 1998

Amazon.com online description:  http://www.amazon.com/exec/obidos/tg/feature/-/6779/103-8587514-0449445

A good source of examples, with tutorials, organized more for learning than for reference; content is targeted at desktop browsers.