Andy's Introductory JavaScript Tutorials
Includes a great set of JavaScript tutorials and explanations for those beginning to learn JavaScript. Also has a resource section where you can find other javascript resources.

A Beginner's Guide to JavaScript
A nice site with javascript tips and examples for you to try out on your site!

Beginning JavaScript Tutorials
A great tutorial for javascript beginners, easy to read and follow. Also includes some advanced javascript tutorials.

JavaScript Kit
A nice introduction and tutorial for JavaScript. Also includes free scripts.