js 监听手机返回键

<script>
    $(function(){
        pushHistory();
        window.addEventListener("popstate", function(e) {
            window.location = 'http://www.baidu.com'
        }, false);
        function pushHistory() {
            var state = {
                title: "title",
                url: "#"
            };
            window.history.pushState(state, "title", "#");
        }
    });
</script>