http://simon.incutio.com/slides/2006/etech/javascript/js-reintroduction-notes.html
This is a fantastic article on Javascript IMHO, perfectly aimed at a developer like myself who has lots of programming experience but not so much knowledge of Javascript.
The bits on closures and IE Memory Leaks was especially well explained, as that's something I've come across but never really understood!
And here's a link to his blog on the matter: http://simon.incutio.com/archive/2006/03/07/etech
