jQuery: making a commentbox like FB

Hey. Facebook´s commentbox, how can that be done? So in a textarea there´s "comment..." and when you click it gets bigger, and a button appears, and then wh开发者_JAVA技巧en you type more than the box size, the height of the box increases.

How can this be done?

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• Facebook like multi Toggle Comment Box with jQuery and PHP

1. on .focus(), you .fadeIn() the button
2. the you use jQuery plugin autoresize