span.move-empty{
    padding: 3px 9px;
}

a.move-up {
    padding: 3px 9px;
    background: url("../images/ui-icons_222222_256x240.png") -160px -190px;
}

a.move-down {
    padding: 3px 9px;
    background: url("../images/ui-icons_222222_256x240.png") -127px -190px;
}