How to change white to black?

Hello, I need to change this TSHIRT from White to Black.

could someone teach me how to do that? thanks

images: http://www.ridesocal.com/shop/images/uploads/rsc_tshirt_white_ss.jpg

Thank you!

Open the image in photoshop

In the layers pallet double click the background layer and click Ok in the resulting box. To make the image on a floating layer.

Hit Cmd + I (ctr+i windows)

Now grab the magicwand tool and set its tolerance to like 3 and click the black background. (not the shirt)

Hit delete

Don't delete!
MASK!

err, ummm, yeah...

Mask.