.rtop,.rbottom,.rtopleft,.rtopright,.rbottomleft,.rbottomright{display:block}
.rtop *,.rbottom *,.rtopleft *,.rtopright *,.rbottomleft *,.rbottomright *{display:block;height: 1px;overflow: hidden}

.r1{margin: 0 5px}
.r2{margin: 0 3px}
.r3{margin: 0 2px}
.r4{margin: 0 1px;height: 2px}

.rs1{margin: 0 2px}
.rs2{margin: 0 1px}

.rleft1{margin: 0 0 0 5px}
.rleft2{margin: 0 0 0 3px}
.rleft3{margin: 0 0 0 2px}
.rleft4{margin: 0 0 0 1px;height: 2px}

.rright1{margin: 0 5px 0 0}
.rright2{margin: 0 3px 0 0}
.rright3{margin: 0 2px 0 0}
.rright4{margin: 0 1px 0 0;height: 2px}