Thau's Advanced JavaScript Tutorial
http://www.webmonkey.com/javascript/tutorials/tutorial2.html

Thau
Webmonkey
2001

Abstract:

This article shows you how to make cookies (Mmmmm), and you'll learn fancy string handling and associative arrays along the way. Give your JavaScript a sense of history and time (by setting timelines on your pages so that different events occur at different times), and then learn how to sense which browser your visitors are using.