mootools textarea autoresize

I was looking for a way to create those fancy auto-resizing text fields you're so used from Facebook. Unfortunately I didn't find an existing easy to use out-of-the-box unobstrusive solution, so I gave it a go myself.

Here you go: Textarea Autoresizer using mootools 1.2

The script adjusts the height of a textarea field the more lines you type. (It does not shrink if you delete lines)

It's inspired by Textarea Resizer which is nicely done, but IMHO is not as good from an interface perspective.