js jQuery 判断跳转是手机还是电脑

<script type="text/javascript">
        $(function () {
            var system = {};
            var p = navigator.platform;
            system.win = p.indexOf("Win") == 0;
            system.mac = p.indexOf("Mac") == 0;
            system.x11 = (p == "X11") || (p.indexOf("Linux") == 0);
            if (system.win || system.mac || system.xll) {//如果是电脑跳转到百度
                window.location.href = http://www.baidu.com;
            } else { //如果是手机,跳转到谷歌
                window.location.href = http://www.google.com;
            }
        });
    </script>