关于CSS制作有圆角边框的代码

http-equiv="content-type"
content="text/html;
charset=utf-8">
type="text/css">
div.RoundedCorner{background:
#9BD1FA}
b.rtop,
b.rbottom{display:block;background:
#FFF}
b.rtop
b,
b.rbottom
b{display:block;height:
1px;overflow:
hidden;
background:
#9BD1FA}
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}



class="RoundedCorner">
class="rtop">class="r1">class="r2">class="r3">class="r4">

无图片实现圆角框


class="rbottom">class="r4">class="r3">class="r2">class="r1">