function sleep(delay) {
  var start = new Date().getTime();
    while (new Date().getTime() - start < delay) {
      continue;
    }
  }
  
Date.prototype.Format = function (fmt) {
  //author: meizz
  var o = {
      "M+": this.getMonth() + 1, //月份
      "d+": this.getDate(), //日
      "h+": this.getHours(), //小时
      "m+": this.getMinutes(), //分
      "s+": this.getSeconds(), //秒
      "q+": Math.floor((this.getMonth() + 3) / 3), //季度
      S: this.getMilliseconds(), //毫秒
  };
  if (/(y+)/.test(fmt))
      fmt = fmt.replace(
      RegExp.$1,
      (this.getFullYear() + "").substr(4 - RegExp.$1.length)
      );
  for (var k in o)
      if (new RegExp("(" + k + ")").test(fmt))
      fmt = fmt.replace(
          RegExp.$1,
          RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length)
      );
  return fmt;
};