Anyone know how to do this effect?

http://www.michelfortin.com/

The image/signup at the bottom of the page?

Here's css that gets close to what I am interested in.

The css code I am showing will display an image at the bottom, but the text will show up on top of the image (I want the image to be on top of the text).

Tried adjusting the z-index and multiple google searches aren't turning up something readily.

Thanks.

Dave