capturing onkeyup for the whole page

[Cartoper]

I am working on a image viewing site where I need the left and right
arrows to move to the previous/next images, respectfully. I tried to
wire in an event on the body but it doesn't seem to be working. How
do I capture document wide onkeyup events?

 

[Cartoper]

I am working on a image viewing site where I need the left and right
arrows to move to the previous/next images, respectfully. I tried to
wire in an event on the body but it doesn't seem to be working. How
do I capture document wide onkeyup events?

Is it even possible to capture a key for the whole document?