Netscape has some good information at Netscape javaScript (t) There are some interesting articles at ZDNet (t) There is one on quizzes and tutorials that contains some interesting techniques. Theo's build-time scripting stuff is in Theo's stuff (t)
Also extremely useful are the following:
Finally, here is the link for the firstPage 2000 download, a very good, free web authoring tool: Eversoft's firstPage 2000
Site on DHTML especially a library for cross browser DHTML.