Online Resources

Javascript Documentation
Mozilla Developer Center
https://developer.mozilla.org/en/JavaScript

JavaScript Style Guide
Google Code
http://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml

JavaScript Best Practices
Dev.Opera
http://dev.opera.com/articles/view/javascript-best-practices

JavaScript Reference (beta)
SitePoint
http://reference.sitepoint.com/javascript

JavaScript Garden
documentation about the most quirky parts of the JavaScript programming language
http://bonsaiden.github.com/JavaScript-Garden

Stackoverflow
JavaScript Chat Room at Stackoverflow
http://chat.stackoverflow.com/rooms/17/javascript

JS Mentors
JavaScript Mailing List
http://jsmentors.com

JsMag
the magazine for JavaScript developers
http://www.jsmag.com

JSLint
the JavaScript Code Quality Tool by Douglas Crockford
http://jslint.com

JSHint
an Community Driven Fork of JSLint
http://jshint.com

nettuts+
tutorials and articles for design and build websites
http://net.tutsplus.com/

JS Beautifier
online tool will reformat and reindent ugly javascript
http://jsbeautifier.org

Learning Advanced JavaScript
John Resig
http://ejohn.org/apps/learn

JavaScript Weekly
A concise, once–weekly free roundup of JavaScript news and articles.
http://javascriptweekly.com

ECMAScript Documentation
The ECMA-262 standard is the official documentation for the ECMAScript language.
http://www.ecmascript.org

ECMA-262-3 in detail
by Dmitry A. Soshnikov
http://dmitrysoshnikov.com/tag/ecma-262-3

Named function expressions demystified
by Juriy „kangax“ Zaytsev
http://kangax.github.com/nfe/

Audio and Video Podcast

the changelog
weekly podcast about new open source stuff
http://thechangelog.com

Crockford on JavaScript:
a Public Lecture Series at Yahoo!
http://yuiblog.com/crockford

yayQuery – The Official jQuery Podcast
by Paul Irish, Rebecca Murphey, Alex Sexton, Adam Sontag
http://yayquery.com

Learn JS
1 Min JavaScript videos
http://learnjs.org

jQuery for Designers
jQuery Video Podcast for Designers
http://jqueryfordesigners.com