<!–
.dtop,.dbottom{display:block;background-color:#ffffff /* change the color of the corners here */}
.dtop b,.dbottom b{display:block;height:0px;overflow:hidden;background:#000}
.d1{margin:0 0px}.d2{margin:0 0px}.d3{margin:0 0px}.dtop .d4,.dbottom b.d4{margin:0 0px;height:0px}
–>