监听浏览器回退事件

pushHistory();

window.addEventListener("popstate", function(e) {

      alert（999）;

      window.location.href = 'http://www.baidu.com';

    }, false);

    function pushHistory() {

      var state = {

        title: "title",

        url: "#"

      };

      window.history.pushState(state, "title", "#");

    }