#tb-galeria {
    border-collapse:collapse;
    border-style:solid;
    border-color: #FFF;
    border-width: 0 0 0;
}

#tb-galeria td {
    padding:0;
}

#tb-galeria td.thumb {
    display:none;
    border-style:solid;
    border-color: #FFF;
    border-width: 3px;
    
}

#tb-galeria td.thumb a img {
    border-width:0;
}