#mattepainting a {display:block; width:650px; height:448px; background: url("../architecture/images/matte_rollover.jpg") 0 0 no-repeat; border: 0px;	padding: 0px; margin: 0px;
}
#mattepainting a:hover {background-position: -650px 0;
}
#mattepainting a:active {background-position: -650px 0;
}