JavaScript实现页面无操作倒计时退出

//设置（倒计时功能）开关
var _mouseActiveListener_flag = true;

var mouseActiveListener = function (beforecount, count, callback) {
 //config
var __countdown_html = '<div id="__tt" style="position:fixed;top:110px;right:10px;z-index:1000;color:#eee;font-size:25px;"></div>';
 //define
 var target = null, _t = null, _tc = null;
var target_countdown = function (__count) {
  if (__count >= 0) {
  target.innerHTML = __count + '秒后退出';
  _tc = setTimeout(function () {
   target_countdown(__count);
  }, 1000);
  } else {
  callback();
  }
  __count--;
 }, _t_exec = function () {
  return setTimeout(function () {
  if (_mouseActiveListener_flag) {
   target = Ne.dom.createEl(__countdown_html);
   document.body.appendChild(target);
   target_countdown(count);
  }
  }, beforecount);
 }, _t_clear = function () {
  clearTimeout(_t);
  clearTimeout(_tc);
  //target.parentElement.removeChild(target);
  $(target).remove();
  target = null;
 };
 //exec
 _t = _t_exec();
 document.addEventListener('click', function () {
  _t_clear();
  _t = _t_exec();
 });
 };

//后置操作，解释：在5秒后（5000）不操作的状态下触发倒计时，倒计时180秒，具体看View Code里面的函数。
mouseActiveListener(5000, 180, function () {
 window.location.href = "/Home/Index";
 });