table.history { margin-right: auto; margin-left: auto; border-top: 1px solid silver; border-left: 1px solid silver }
td.date  { text-align: left; padding: 4px; border-right: 1px solid silver; border-bottom: 1px solid silver; width: 140px }
td.naiyou  { text-align: left; padding: 4px; border-right: 1px solid silver; border-bottom: 1px solid silver }