#numpad table td#key1 {
background-image: url("1.png");
}
#numpad table td#key1:active,
#numpad table td#key1:focus {
background-image: url("1d.png");
}
this works like i want it to on the computer (the image changes when i push my mouse key down on it), but it has no effect on the ipad. how can i do this on ipad so that when my finger is on one of the images it will change it with css?