XMLHttpRequest原生请求
var result = null;
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
if (xhr.readyState == 4 && xhr.status == 200) {
result = xhr.responseText;
}
}
xhr.open('GET', 'http://www.fangdi.com.cn/eval_decrypt', false);
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xhr.send();