禁止浏览器后退

$(function(){
    jQuery(document).ready(function () {
        if (window.history && window.history.pushState) {
            $(window).on('popstate', function () {
                /*当点击浏览器的 后退和前进按钮 时才会被触发*/            
                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);
    });
});