浏览器回退按钮，不做回退

    if (window.history && window.history.pushState) {
      //监听浏览器前进后退事件
      $(window).on('popstate', function () {
        window.history.pushState('forward', null, '#');
        window.history.forward(1);
      });
    }
    window.history.pushState('forward', null, '#'); //在IE中必须得有这两行
    window.history.forward(1);