How can it be useless to post links to JavaScript resources in a JavaScript forum?
That some people decide to disable it is hardly relevant, especially considering that JavaScript is used all over the internet. Not to mention the large amount of people who want to learn using it.
JScript Language Reference & User Guide - Microsoft Developer Network (JScript is MS's version of JavaScript in IE)
W3School's JavaScript section
Gecko DOM Reference - Very good for checking cross-browser compatibility
HowToCreate.co.uk JavaScript tutorial - Just found it, has some really important guidelines in it.