代码
<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>
<table style="500px;height:100px;">
<tr>
<td>单元格1</td>
<td>单元格2</td>
</tr>
<tr>
<td>单元格3</td>
<td>单元格4</td>
</tr>
</table>
<b class="rbottom"><b class="r4"></b><b class="r3"></b>
<b class="r2"></b><b class="r1"></b></b>
</div>
</body>
</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>
<table style="500px;height:100px;">
<tr>
<td>单元格1</td>
<td>单元格2</td>
</tr>
<tr>
<td>单元格3</td>
<td>单元格4</td>
</tr>
</table>
<b class="rbottom"><b class="r4"></b><b class="r3"></b>
<b class="r2"></b><b class="r1"></b></b>
</div>
</body>
</html>
效果如下：
