js判断是pc端还是移动端

        function checkMobile() {
            var pda_user_agent_list = new Array("2.0 MMP", "240320", "AvantGo", "BlackBerry", "Blazer",
                    "Cellphone", "Danger", "DoCoMo", "Elaine/3.0", "EudoraWeb", "hiptop", "IEMobile", "KYOCERA/WX310K", "LG/U990",
                    "MIDP-2.0", "MMEF20", "MOT-V", "NetFront", "Newt", "Nintendo Wii", "Nitro", "Nokia",
                    "Opera Mini", "Opera Mobi",
                    "Palm", "Playstation Portable", "portalmmm", "Proxinet", "ProxiNet",
                    "SHARP-TQ-GX10", "Small", "SonyEricsson", "Symbian OS", "SymbianOS", "TS21i-10", "UP.Browser", "UP.Link",
                    "Windows CE", "WinWAP", "Android", "iPhone", "iPod", "iPad", "Windows Phone", "HTC"/*, "GTB"*/);
            var pda_app_name_list = new Array("Microsoft Pocket Internet Explorer");
            var user_agent = navigator.userAgent.toString();
            for (var i = 0; i < pda_user_agent_list.length; i++) {
                if (user_agent.indexOf(pda_user_agent_list[i]) >= 0) {
                    return true;
                }
            }
            var appName = navigator.appName.toString();
            for (var i = 0; i < pda_app_name_list.length; i++) {
                if (user_agent.indexOf(pda_app_name_list[i]) >= 0) {
                    return true;
                }
            }
            return false;
        }

使用：

            if (checkMobile()) {
                //移动端
                //do something
            }
            else {
                //pc端
                //do something
            }