th.all {border-width:1px; border-style: solid;
        font-weight:bold; background-color:#BBBBBB}
th.left {border-width:1px; border-right-width:0; border-style: solid;
         font-weight:bold; background-color:#BBBBBB}
th.right {border-width:1px; border-left-width:0; border-style: solid;
          font-weight:bold; background-color:#BBBBBB}

td.left {border-width:1px; border-right-width:0; border-style: solid}
td.right {border-width:1px; border-left-width:0; border-style: solid}
td.tb {border-width:0; border-top-width:1px; border-bottom-width:1px;
       border-style: solid}
td.all {border-width:1px; border-style: solid}