div#mj{ margin: 0 1%;background-image:url(http://sr-training.de/img/backr-grau.jpg);}
b.rtop, b.rbottom{display:block;background: #FFF}
b.rtop b, b.rbottom b{display:block;height: 1px;
overflow: hidden; background-image:url(http://sr-training.de/img/backr-grau.jpg);}
b.r1{margin: 0 5px}
b.r2{margin: 0 3px}
b.r3{margin: 0 2px}
b.rtop b.r4, b.rbottom b.r4{margin: 0 1px;height: 2px}