#lbPrevLink:hover {
    background: transparent url(sb_prev.gif) no-repeat 0% 15%;
}
#lbNextLink:hover {
    background: transparent url(sb_next.gif) no-repeat 100% 15%;
}
#lbCloseLink {
    width: 23px;
    height: 22px;
    background: transparent url(sb_close.gif) no-repeat center;
}