禁止浏览器返回登入页面

<script>
        $(document).ready(function (e) {
            var counter = 0;
            if (window.history && window.history.pushState) {
                $(window).on(‘popstate‘, function () {
                    window.history.pushState(‘forward‘, null, ‘#‘);
                    window.history.forward(1);
                    // alert("不可回退");  //如果需在弹框就有它
                    self.location="index.html?v="+version; //如查需要跳转页面就用它
                });
            }
     
            window.history.pushState(‘forward‘, null, ‘#‘); //在IE中必须得有这两行
            window.history.forward(1);
        });
    </script>