GIF Animations -- The GIF89a specification includes a way to "play"
a sequence of images, which results in an animation. The following URL
contains examples, explains the spec, and explains how you can creates
such images.
HTML - Detailed Reference (covers many popular browsers)
The nicest, most detailed reference manual I've seens is from Sandia
National Laboratories: HTML
Reference Manual. It covers differences in HTML in various popular
Web browsers (Netscape, Microsoft Internet Explorer, etc.)
Dawn Groves, The Web Page Workbook, Franklin, Beedle, and Associates,
1996, ISBN 1-887902-05-8.
Softcover HTML Book for Experts
Laura Lemay, Teach Yourself Web Publishing with HTML 3.0 in a Week,
Sams Net, 2nd ed., 1996, ISBN 1-57521-064-9, $29.99. A comprehensive reference
manual for HTML 2.0, HTML 3.0, the Netscape extensions, and the Microsoft
Internet Explorer extensions.
Joe
Gillespie, Web
Page Design for Designers, Pixel Productions. Intended for "people
who are involved with design and typography for conventional print and
want to explore the possibilities of this new electronic medium."