客户端信息检测

client.js

var  client = function(){

    var engine = {
        ie: 0,
        gecko: 0,
        webkit: 0,
        khtml: 0,
        opera: 0,
        ver: null
    };

    var browser = {
        ie: 0,
        firefox: 0,
        safari: 0,
        konq: 0,
        opera: 0,
        chrome: 0,
        ver: null
    };

    var system = {
        win: false,
        max: false,
        x11: false,

        iphone: false,
        ipod: false,
        ipad: false,
        ios: false,
        android: false,
        nokiaN: false,
        winMobile: false,

        wii: false,
        ps:false
    };

    var ua = navigator.userAgent;

    if(window.opera){
        engine.ver = browser.ver = window.opera.version();
        engine.opera = browser.opera = parseFloat(engine.ver);

    }else if(/AppleWebKit\/(\S+)/.test(ua)){
        engine.ver = RegExp["$1"];
        engine.webkit = parseFloat(engine.ver);
        
        if(/Chrome\/(\S+)/.test(ua)){
            browser.ver = RegExp["$1"];
            browser.chrome = parseFloat(browser.ver);
        
        }else if(/Version\/(\S+)/.test(ua)){
            browser.ver = RegExp["$1"];
            browser.safari = parseFloat(browser.ver);
        
        }else{
            var safariVersion = 1;
            if(engine.webkit < 100){
                safariVersion = 1;
            }else if(engine.webkit < 312){
                safariVersion = 1.2;
            }else if(engine.webkit < 412){
                safariVersion = 1.3;
            }else{
                safariVersion = 2;
            }

            browser.safari = browser.ver = safariVersion;
        }

    }else if(/KHTML\/(\S+)/.test(ua) || /Konqueror\/([^;]+)/.test(ua)){
        engine.ver = browser.ver = RegExp["$1"];
        engine.khtml = browser.konq = parseFloat(engine.ver);

    }else if(/rv:([^\)]+)\) Gecko\/\d{8}/.test(ua)){
        engine.ver = RegExp["$1"];
        engine.gecko = parseFloat(engine.ver);

        if(/Firefox\/(\S+)/.test(ua)){
            browser.ver = RegExp["$1"];
            browser.firefox = parseFloat(browser.ver);
        }
    
    }else if(/MSIE ([^;]+)/.test(ua)){
        engine.ver = browser.ver = RegExp["$1"];
        engine.ie = browser.ie = parseFloat(engine.ver);
    }

    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){
        if(/Win(?:dows )?([^do](2))\s?(\d+\.\d+)/.test(ua)){
            if(RegExp["$1"] == "NT"){
                switch(RegExp["$2"]){
                    case "5.0":
                        system.win = "2000";
                        break;
                    case "5.1":
                        system.win = "XP";
                        break;
                    case "6.0":
                        system.win = "Vista";
                        break;
                    case "6.1":
                        system.win = "7";
                        break;
                    default:
                        system.win = "NT";
                        break;
                }

            }else if(RegExp["$1"] == "9x"){
                system.win = "ME";
            
            }else{
                system.win = RegExp["$1"];
            }
        }
    }

    system.iphone = ua.indexOf("iPhone") > -1;
    system.ipod = ua.indexOf("iPod") > -1;
    system.ipad = ua.indexOf("iPad") > -1;
    system.nokiaN = ua.indexOf("NokiaN") > -1;

    if(system.win == "CE"){
        system.winMobile = system.win;

    }else if(system.win == "Ph"){
        if(/Windows Phone OS (\d+.\d+)/.test(ua)){
            system.win = "Phone";
            system.winMobile = parseFloat(RegExp["$1"]);
        }
    }

    if(system.mac && ua.indexOf("Mobile") > -1){
        if(/CPU (?:iPhone )?OS (\d+_\d+)/.test(ua)){
            system.ios = parseFloat(RegExp.$1.replace("_","."));
        }else{
            system.ios = 2;
        }
    }

    if(/Android (\d+\.\d+)/.test(ua)){
        system.android = parseFloat(RegExp.$1);
    }

    system.wii = ua.indexOf("Wii") > -1;
    system.ps = /playstation/i.test(ua);

    return {
        engine: engine,
        browser: browser,
        system: system
    };
}();