Any JavaScript/AJAX library to resize an image for upload?

[eluser]Optimus Prime[/eluser]
Hi!

I want to know if somebody knows about a JavaScript / Ajax Library to resize and crop a image on the client side?

I'm trying to add one to upload images resized instead to resize on the server's side because the images to upload are to larger and heavy. If is possible, to crop an area of the image and upload it.

There is a library like this on the net? Commercial versions are welcome , but i prefer Open-Source/GNU/GPL/LGPL.