.__chrontab{border-collapse:collapse}
.__chrontab tr th{
font-weight:normal;
border-bottom:1px solid black;
vertical-align:top;
}
.__chrontab tr td{
vertical-align:top;
}
.__chrontab tr th:nth-child(1),
.__chrontab tr td:nth-child(2){
border-right:1px solid black;
vertical-align:top;
}