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var xhr = new XMLHttpRequest();
var data = "";// 待校验激活码
var datas = [];// 待校验激活码数组
var alphabet = "abcdefghijklmnopqrst".split("");
var nums = "0123456789".split("");

xhr.withCredentials = true;

xhr.addEventListener("readystatechange", function () {
console.log(this.responseText);
  if (this.readyState === 4) {
    let responseText = this.responseText;
    if (responseText.includes("0")) return;// 当激活码可以使用时，其结果包含0
    sleep(3000);// 休眠指定时间防止被草榴封ip
    check();//请求结束后继续下一个验证码
  }
});

// 构造待校验激活码
alphabet.forEach(function(alpha, a_index, a_array){
  nums.forEach(function(num, num_index, num_array){
    // action=reginvcodeck&reginvcode=ddfaj0825fb49578
    data = "action=reginvcodeck&reginvcode=ddfa" + alpha + "0825fb4957" + num;
    datas.push(data);
  })
});

// 休眠
function sleep(numberMillis) {
  var exitTime = new Date().getTime() + numberMillis;
  while (true) {
    if (new Date().getTime() > exitTime) return;
  }
}

// 请求验证激活码
var check = function(){
  let params = datas.pop();
  if (params === undefined) return;
  xhr.open("POST", "http://www.t66y.com/register.php");
  xhr.setRequestHeader("Upgrade-Insecure-Requests", "1");
  xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
  xhr.setRequestHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8");
  xhr.setRequestHeader("Accept-Language", "zh-CN,zh;q=0.9,ja;q=0.8,zh-TW;q=0.7,en;q=0.6");
  console.log(params)
  xhr.send(params)
}
check();