I usually don't post just links to others' posts, but the thing I supposed to publish tonight is not ready yet - and I think this new support for JavaScript in NetBeans 6.1 is worth of attention:
http://www.netbeans.tv/screencasts/Demo-of-New-JavaScript-Editor-in-NetBeans-IDE-6.1-340

I've basically done nothing so far in JavaScript, but in the next days I'm going to prepare a few mocks for some publishing features of blueMarine and a new idea of a demo that could be available in mid July - so this support from NetBeans is great for me. In particular I appreciate the online docs, that appear during autocompletion, and the reference to the browsers that support a certain function call, as cross-browser compatibility one of the hardest part for me, definitely a novice in the JavaScript world.