常见边框
引用：http://www.codefans.net/jscss/code/1064.shtml
<html>
<head>
<title>边框样式</title>
</head>
<body>
<p style=border-style:none>无边框</p>
<p style=border-style:dotted>点线式边框</p>
<p style=border-style:dashed>破折线式边框</p>
<p style=border-style:solid>直线式边框</p>
<p style=border-style:double>双线式边框</p>
<p style=border-style:groove>槽线式边框</p>
<p style=border-style:ridge>脊线式边框</p>
<p style=border-style:inset>内嵌效果的边框</p>
<p style=border-style:outset>突起效果的边框</p>
</body>
</html>
