Bootstrap3 显示关闭按钮—

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"> 
    <title>Bootstrap3 显示关闭按钮 - 迹忆客(jiyik.com)</title> 
    <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">  
    <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
    <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
​
<div class="container">
    <h2>实例</h2>
    <p> .close 类可以显示一个关闭按钮。</p>
    <button type="button" class="close"><span aria-hidden="true">x</span><span class="sr-only">关闭</span></button>
</div>
​
</body>
</html>