/* set corner styles used to create on the fly CSS round corners */
.rtop, .rbottom{display:block}
.rtop *, .rbottom *{display:block; height: 1px; overflow: hidden; }
/* 4 stage lg cnr */
.r1{margin: 0 5px;}
.r2{margin: 0 3px}
.r3{margin: 0 2px}
.r4{margin: 0 1px; height: 2px;} 
/* 2 stage sm cnr */
.rs1{margin: 0 2px}
.rs2{margin: 0 1px}