#lbPrevLink, #lbPrevLink:hover {
    background: transparent url(img/prev.gif) no-repeat top left;
}
#lbNextLink, #lbNextLink:hover {
    background: transparent url(img/next.gif) no-repeat top right;
}
#lbCloseLink {
    width: 26px;
    height: 26px;
    background: transparent url(img/close.gif) no-repeat center;
}