td.dragHandle, th.dragHandle {
    background-image: url(../img/updown_grey.gif);
    background-repeat: no-repeat;
    background-position: center center;
    max-width: 40px;
}

td.showDragHandle {
    background-image: url(../img/updown.gif);
    background-repeat: no-repeat;
    background-position: center center;
    cursor: move;
}