$(document).ready(function(e) {
            var counter = 0;
            if (window.history && window.history.pushState) {
            window.onpopstate = function () {
                        window.history.pushState(‘forward‘, null, ‘#‘);
                        window.history.forward(1);
                        alert(
 
"不可回退");
                    };
            }
            window.history.pushState(‘forward‘, null, ‘#‘); //在IE中必須得有這兩行
            window.history.forward(1);
});

js 捕獲瀏覽器後退事件