小编Sta*_*089的帖子

我想从ajax响应中获取数据,但此代码不起作用:

var request = new XMLHttpRequest();
request.open("GET", "http://localhost/test/test.php", true);
request.send(null);
request.onreadystatechange = function() {
    if (request.readyState == 4) {
        alert(request.responseText.document.getElementById('div1').innerHTML);
    }   
}

控制台显示此错误:

Uncaught TypeError: Cannot read property 'getElementById' of undefined.

是什么原因引起了这个？