.divarrondi { background:#ffffff; width:728px;  }
 
b.dtop, b.dbas{ display :block;background:#eaeaea; font-size:1px; }
b.dtop b, b.dbas b{display:block;height: 1px; font-size:1px;
    overflow: hidden; background:#00B900;}
b .r1 {margin: 0 5px ; font-size:1px;}
b.r2{margin: 0 3px ; font-size:1px;}
b.r3{margin: 0 2px ; font-size:1px;}
b.dtop b.r4, b.dbas b.r4{margin: 0 1px;height: 1px; font-size:1px;}