console 命令行工具 X clear
console
<html>
    <head>
        <title>用户登录</title>
    </head>
    <body>
        <form>
            <table>
                <tr>
                    <td>
                        <script>document.write("用户名：")</script>
                    </td>
                    <td><input type="text" value="aaa"></td>
                </tr>
                <tr>
                    <td>密码：</td>
                    <td><input type="password" value=123456></td>
                </tr>
                <tr>
                    <td>
                        <a href="javascript:window.alert("登陆成功")">登陆成功</a>
                    </td>
                    <td>
                        <a href="javascript:window.close()">关闭窗口</a>
                    </td>
                </tr>
            </table>
        </form>
    </body>
</html>