.rbroundbox { background: url("images/nt.gif") repeat; }
.rbtop div { background: url("images/tl.gif") no-repeat top left; }
.rbtop { background: url("images/tr.gif") no-repeat top right; }
.rbbot div { background: url("images/bl.gif") no-repeat bottom left; }
.rbbot { background: url("images/br.gif") no-repeat bottom right; }

/* height and width stuff, width not really nessisary. */
.rbtop div, .rbtop, .rbbot div, .rbbot {
width: 600px;
/*height: 7px;*/
font-size: 1px;
}
.rbcontent { margin: 0 7px; }
.rbroundbox { /*width: 50%;*/ margin: 1em auto; }