th {
    cursor: pointer;
}

    th.headerSortUp {
        background-image: url(../Imagenes/ImagenesWeb/asc.gif) !important;
        background-position: right center;
        background-repeat: no-repeat;
    }

    th.headerSortDown {
        background-image: url(../Imagenes/ImagenesWeb/desc.gif) !important;
        background-position: right center;
        background-repeat: no-repeat;
    }

td {
    border-bottom: solid 1px #dadada;
}