.t {background: url(dot.png) 0 0 repeat-x; width: 100%}
.b {background: url(dot.png) 0 100% repeat-x}
.l {background: url(dot.png) 0 0 repeat-y}
.r {background: url(dot.png) 100% 0 repeat-y}
.bl {background: url(bottomleft.png) 0 100% no-repeat}
.br {background: url(bottomright.png) 100% 100% no-repeat}
.tl {background: url(topleft.png) 0 0 no-repeat}
.tr {background: url(topright.png) 100% 0 no-repeat; padding:10px}