.hborder-top-cell
 { height:20px;
   border:0;
 }
.hborder-bottom-cell
 { height:20px;
 }
.vborder-right-cell
 { width:20px;
 }
.vborder-left-cell
 { width:20px;
   border:0;
 }
 .corner-tl-border-cell
 { height:20px;
   width:20px;
   border:0;
 }
 .corner-tr-border-cell
 { height:20px;
   width:20px;
   border:0;
 }
 .corner-bl-border-cell
 { height:20px;
   width:20px;
 }
 .corner-br-border-cell
 { height:20px;
   width:20px;
 }