function toggleBox(element, count, group) {
    for (i = 0; i< count; i++) {
        if (element != i) {
            document.getElementById('box_' + group + '_' + i).className = "letterbox_inactive";
            document.getElementById('button_' + group + '_' + i).className = "index_button_inactive";
        } else {
            document.getElementById('box_' + group + '_' + i).className = "letterbox_active";
            document.getElementById('button_' + group + '_' + i).className = "index_button_active";
        }
    }
}