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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Example of CSS outline-style property</title>
<style>
p {
outline-style: double;
outline-width: 5px;
}
</style>
</head>
<body>
<p><strong>注意:</strong> Internet Explorer 7和早期版本不支持outline属性。IE8只有在指定了<code><!DOCTYPE></code>时才支持轮廓属性.</p>
</body>
</html>