Após.onreadystatechange = function() {
        if (this.readyState == 4 && this.status == 200) {
            ?
        }
    };
user
Após.onreadystatechange = function() {
        if (this.readyState == 4 && this.status == 200) {
            document.getElementById("demo").innerHTML = this.responseText;
        }
    };
assistant