<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title></title>
<style type="text/css">
.box {
width: 500px;
height: 300px;
outline: dashed #0082cb;
border: 1px solid red;
}
</style>
</head>
<body>
<div class="box">
ontline-style:dashed:定义点状的轮廓；
solid
double
groove:定义3D凹槽轮廓，此效果取决于outline-width的值
ridge:定义3D凹槽轮廓，此效果取决于outline-color值
inset:定义3D凹边轮廓，此效果取决于outline-color的值；
outset:定义3D凹边轮廓，此效果取决于outline-color的值；
inherit:继承;
ooutline-color;outline-width;
</div>
</body>
</html>
原文：http://www.cnblogs.com/dsheldon/p/4950912.html