使用CSS设置插入边框
要使用CSS设置插入边框，请使用带有值插入的border-style属性。
示例
<html>
<head>
</head>
<body>
<p style = "border-width:4px; border-style:none;">
This is a border with none width.
</p>
<p style = "border-width:4px; border-style:inset;">
This is inset border.
</p>
</body>
</html>