Compute sprite-sheet dimensions and CSS background-position rules.
.sprite { width: 64px; height: 64px; background: url(sprite.png) no-repeat; }
.sprite-1 { background-position: -0px -0px; }
.sprite-2 { background-position: -64px -0px; }
.sprite-3 { background-position: -128px -0px; }
.sprite-4 { background-position: -192px -0px; }
.sprite-5 { background-position: -0px -64px; }
.sprite-6 { background-position: -64px -64px; }
.sprite-7 { background-position: -128px -64px; }
.sprite-8 { background-position: -192px -64px; }