​x
 
<!DOCTYPE html>
<!DOCTYPE html>
<html>
<head>
<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>
<h1>border-top-style 属性</h1>
​
<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>