mark.
I'am sorry that i forget where it is come from.
I just google it.
Follow are the code.RoundedCorner
<html>
<head>
<style 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
}
</style>
</head>
<body>
<div class="RoundedCorner">
<b class="rtop">
<b class="r1"> </b>
<b class="r2"></b>
<b class="r3"></b>
<b class="r4"></b>
</b>
<br> test test test test <br>
<b class="rbottom">
<b class="r4"> </b>
<b class="r3"></b>
<b class="r2"></b>
<b class="r1"></b>
</b>
</div>
</body>
</html>