"JavaScript" browser user agent detection script implementation

The following is a complete user agent string detection script, including detection of the rendering engine, platform, Windows operating system, mobile device, and game system.

var client = function () {//render engine var engine = {ie:0,gecko:0,webkit:0,khtml:0,opera:0,//full version number ver:null};//browser Var brow  Ser = {//main browser ie:0, firefox:0, safari:0, konq:0, opera:0, chrome:0,//specific version number ver: null};//platform, device, and operating system var system = {win:false,mac:false,x11:false,//mobile device Iphone:false, Ipod:false, ipad: False, Ios:false, Android:false, Nokian:false, winmobile:false,//game system Wii:false,ps:false        };//detection rendering engine and browser 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["$"]; Engine.webkit = parsefloat (engine.ver);//Determine if Chroeme or Safari if (/chrome\/(\s+)/.test (UA)) {browser.ver = RegEx            P["$"];        Browser.chrome = parsefloat (browser.ver); } else if (/version\/(\s+)/.test (UA)) {            Browser.ver = regexp["$"];        Browser.safari = parsefloat (browser.ver);            } else {//approximately determines the version number var safariversion = 1;            if (Engine.webkit <) {safariversion = 1;            } else if (Engine.webkit < 312) {safariversion = 1.2;            } else if (Engine.webkit < 412) {safariversion = 1.3;            } else {safariversion = 2;                } Browser.safari = Browser.ver = safariversion; }} else if (/khtml\/(\s+)/.test (UA) | |/konqueror\/([^;]        +)/.test (UA)) {engine.ver = Browser.ver = regexp["$"];    engine.khtml = Browser.konq = parsefloat (engine.ver);        } else if (/RV: ([^\)]+) \) gecko\/\d{8}/.test (UA)) {Engine.ver = regexp["$"];       Engine.gecko = parsefloat (engine.ver);            Determine if Firefox if (/firefox\/(\s+)/.test (UA)) {Browser.ver = regexp["$"]; Browser.firefox = ParsEfloat (Browser.ver); }} else if (/msie ([^;]        +)/.test (UA)) {engine.ver = Browser.ver = regexp["$"];    engine.ie = browser.ie = parsefloat (engine.ver);    }//detection Browser browser.ie = engine.ie; Browser.opera = engine.opera;//detection platform var p = Navigator.platform;system.win = P.indexof ("win") = = 0;system.mac = P.indexOf (" Mac ") = = 0;system.x11 = (p = =" x11 ") | | (P.indexof ("Linux") = = 0);//Detect Windows operating system if (System.win) {if (/win (?:d ows)? ( [^do] {2}) \s? (\d+\.\d+)/.test (UA) {if (regexp["] = =" NT ") {switch (regexp[" $ "]) {case" 5.0 ": System.win =" $ "; 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["$"] = = "9x") {System.win = "ME";} Else{system.win = regexp["$"];}}} Mobile device System.iphone = Ua.indexof ("iphone") > -1;system.ipod = Ua.indexof ("ipod") > -1;system.ipad = Ua.indexof ("IP Ad ") >-1;system.nokian = Ua.indexof (" Nokian ") > -1;//Windows Mobileif (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["$"]);}} Detect iOS version if (System.mac && ua.indexof ("Mobile") >-1) {if (/cpu (?:P hone)? OS (\d+_\d+)/.test (UA)) {System.ios = parsefloat (Regexp.$1.replace ("_", "."));} Else{system.ios = 2;//can not be really detected, so can only guess}}//detect Android version if (/android (\d+\.\d+)/.test (UA)) {system.android = parsefloat ( REGEXP.$1);} Game system system.wii = Ua.indexof ("Wii") > -1;system.ps =/playstation/i.test (UA);//Returns these objects return {Engine:eng  INE, Browser:browser, system:system};   Console.log (engine);   Console.log (browser); Console.log (System);} ();

　　

"JavaScript" browser user agent detection script implementation