<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>history 对象示例</title>
    <style>
        body { font-family: Arial, sans-serif; padding: 20px; }
        .section { margin: 20px 0; padding: 10px; border: 1px solid #ddd; }
        button { margin: 5px; padding: 5px 10px; }
        .info { margin-top: 10px; padding: 10px; background: #f0f8ff; }
    </style>
</head>
<body>
    <h1>history 对象示例</h1>
    
    <div class="section">
        <h2>历史记录操作</h2>
        <button onclick="goBack()">后退</button>
        <button onclick="goForward()">前进</button>
        <button onclick="goToPage(-2)">后退 2 页</button>
        <button onclick="goToPage(2)">前进 2 页</button>
        <div class="info">
            <p>说明：请先访问几个页面，然后使用上面的按钮测试历史记录操作。</p>
            <p>点击以下链接打开新页面：</p>
            <a href="https://www.baidu.com" target="_blank">百度</a> | 
            <a href="https://www.google.com" target="_blank">Google</a> | 
            <a href="https://www.github.com" target="_blank">GitHub</a>
        </div>
    </div>
    
    <script>
        // 后退
        function goBack() {
            history.back();
        }
        
        // 前进
        function goForward() {
            history.forward();
        }
        
        // 前进或后退指定页数
        function goToPage(pages) {
            history.go(pages);
        }
    </script>
</body>
</html>