HTML code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无图CSS圆角|www.abaonet.com|</title>
<style type="text/css">
#box{
width:400px;
margin:20px auto;
}
b{
display:block;
}
.b1,.b2,.b3,.b4{
overflow:hidden;
height:1px;
border-left:1px solid #000;
border-right:1px solid #000;
}
.b1{
margin:0 5px;
background:#000;
}
.b2{
margin:0 3px;
border-width:0 2px;
}
.b3{
margin:0 2px;
}
.b4{
height:2px;margin:0 1px;
}
#content{
border:solid #000;
border-width:0 1px;
padding:20px;
text-align:center;
}
</style>
</head>
<body>
<div id="box"><!--容器-->
<b class="top"><!--上半部分圆角-->
<b class="b1"></b><b class="b2"></b><b class="b3"></b><b class="b4"></b>
</b>
<div id="content">CSS圆角</div>
<b class="bottom">
