I've flagged a few links to noteworthy JavaScript posts over the last month.
Yahoo! Video: Advanced JavaScript Part I, Part II, Part III. A lecture by Douglas Crockford.
IEBlog: Jscript Inefficiencies Part I, Part II, Part III.
Rick Strahl: "FireBug 1.0 Beta Rocks". FireBug is a JavaScript debugger with some remarkable features.
Rick again: "HREF links and javascript : Navigation".
Jason Diamond: "Not Delegates".
Jim Ley: "JavaScript Closures".
Sergio Pereira: Quick Guide To Somewhat Advanced JavaScript.
Pathfinder: JsUnit – Agile AJAX Development
Mike West: Scope In JavaScript
Comments
http://www.ieforge.com/CompanionJS/HomePage
This is a very early version (0.1).
And also the DebugBar :
http://www.debugbar.com
where you can view all JS code and execute custom js in an existing page.
Hope this helps.
Firebug debugger tutorial:
http://www.ddj.com/dept/debug/196802787
JS Closures with live samples: blog.morrisjohns.com