Js判斷終端設備類型

<script type="text/javascript">
            //平臺、設備和操作系統 
            var system = {
                win: false,
                mac: false,
                xll: false,
                ipad: false
            };
            //檢測平臺 
            var p = navigator.platform;
            system.win = p.indexOf("Win") == 0;
            system.mac = p.indexOf("Mac") == 0;
            system.x11 = (p == "X11") || (p.indexOf("Linux") == 0);
            system.ipad = (navigator.userAgent.match(/iPad/i) != null) ? true : false;
            //跳轉語句，如果是不是手機訪問就自動跳轉到wap.baidu.com頁面 
            if(system.win || system.mac || system.xll || system.ipad) {
                    window.location.href = "http://www.baidu.com";
            } else {
                window.location.href = "http://www.jdpatro.com/3g/";
            }
        </script>

測試成功