.bstylenone {border-style: none;
    border-bottom-width: medium;  border-left-width: medium;
    border-right-width: medium;  border-top-width: medium;}

.bwidth10px {border-style: solid;
    border-bottom-width: 10px ;  border-left-width: 10px ;
    border-right-width: 10px ;   border-top-width: 10px ;}

.bwidth5px {border-style: solid;
    border-bottom-width: 5px ;  border-left-width: 5px ;
    border-right-width: 5px ;  border-top-width: 5px ;}

.bwidth02em {border-style: solid;
    border-bottom-width: 0.2em ;  border-left-width: 0.2em ;
    border-right-width: 0.2em ;  border-top-width: 0.2em ;}

.bwidth06em {border-style: solid;
    border-bottom-width: 0.6em ;  border-left-width: 0.6em ;
    border-right-width: 0.6em ;  border-top-width: 0.6em ;}

.bwidth1ex {border-style: solid;
    border-bottom-width: 1ex ;  border-left-width: 1ex ;
    border-right-width: 1ex ;  border-top-width: 1ex ;}

.bwidth2ex {border-style: solid;
    border-bottom-width: 2ex ;  border-left-width: 2ex ;
    border-right-width: 2ex ;  border-top-width: 2ex ;}