在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(cainiaoplay.com)</title>
<style>p 
{
border-style:solid;
}
p.none {border-top-style:none;}
p.dotted {border-top-style:dotted;}
p.dashed {border-top-style:dashed;}
p.solid {border-top-style:solid;}
p.double {border-top-style:double;}
p.groove {border-top-style:groove;}
p.ridge {border-top-style:ridge;}
p.inset {border-top-style:inset;}
p.outset {border-top-style:outset;}
</style>
</head>

<body>
<p class="none">无上底边界。</p>
<p class="dotted">点上底边界。</p>
<p class="dashed">虚线上底边界。</p>
<p class="solid">实线上底边界。</p>
<p class="double">双线上底边界。</p>
<p class="groove">凹槽上底边界。</p>
<p class="ridge">垄状上底边界。</p>
<p class="inset">嵌入上底边界。</p>
<p class="outset">外凸上底边界。</p>
</body>
</html>
源代码

动行结果
