Thanks for this, bookmarked.

I actually find little quick explanations like this extremely pragmatic and useful. I don't do a whole lot of JS, but I certainly need to dive in occasionally. Having quick references like this one readily available is preferable to finding my Crockford book and flipping through the pages. If you need to develop a client-side app or do heavy JS coding, maybe read the Crockford book...but if all you need to do is get some shit working real quick links like this one are invaluable.