Here is a list of Javascript and Dojo learning resources (thanks Grayson) that I use. If you know of any good links, add in a comment and I will update the post.
Javascript
Essential Javascript – A Javascript Tutorial
http://www.comptechdoc.org/independent/web/cgi/javamanual/
http://www.w3schools.com/jsref/default.asp
http://javascript.crockford.com/
Dojo
http://dojotoolkit.org/key-links
http://www.sitepen.com/labs/dojo.php
http://archive.dojotoolkit.org/nightly/checkout/ (Great source for learning how to use dijits and dojox widgets, check out the tests folder)