.t {background: url(border_t.png) 0 0 repeat-x}
.b {background: url(border_b.png) 0 100% repeat-x}
.l {background: url(border_l.png) 0 0 repeat-y}
.r {background: url(border_r.png) 100% 0 repeat-y}
.bl {background: url(border_bl.png) 0 100% no-repeat}
.br {background: url(border_br.png) 100% 100% no-repeat}
.tl {background: url(border_tl.png) 0 0 no-repeat}
.tr {background: url(border_tr.png) 100% 0 no-repeat}