<h3>3,伪ajax</h3>

<h6>学习iframe(嵌套别人家网站的)</h6>

    <div>

        <input id="url" placeholder="请输入url"><a onclick="Test1();">查看</a>

    </div>

        <iframe id="ifr" style="height: 800px; width: 600px" src="https://www.autohome.com.cn/tianjin/"></iframe>

 function Test1() {

        //伪Ajax

        console.log('1111')

        var url = $('#url').val()

        $('#ifr').attr('src', url)

    }