一些js代码，自己备用的。高手不要笑话我。。（跨浏览器基础事件，浏览器检测，判断浏览器的名称、版本号、操作系统）

跨浏览器基础事件

View Code

 1 //跨浏览器添加事件

 2 function addEvent(obj, type, fn) {

 3     if (obj.addEventListener) {

 4         obj.addEventListener(type, fn, false);

 5     } else if (obj.attachEvent) {

 6         obj.attachEvent('on' + type, function () {

 7             fn.call(obj);

 8         });

 9     }

10 }

11 

12 //跨浏览器移除事件

13 function removeEvent(obj, type, fn) {

14     if (obj.removeEventListener) {

15         obj.removeEventListener(type, fn, false);

16     } else if (obj.detachEvent) {

17         obj.detachEvent('on' + type, fn);

18     }

19 }

20 

21 //跨浏览器阻止默认行为

22 function preDef(evt) {

23     var e = evt || window.event;

24     if (e.preventDefault) {

25         e.preventDefault();

26     } else {

27         e.returnValue = false;

28     }

29 }

30 

31 //跨浏览器获取目标对象

32 function getTarget(evt) {

33     if (evt.target) {        //W3C

34         return evt.target;

35     } else if (window.event.srcElement) {        //IE

36         return window.event.srcElement;

37     }

38 }

39 

40 //跨浏览器获取字符编码

41 function getCharCode(evt) {

42     var e = evt || window.event;

43     if (typeof e.charCode == 'number') {

44         return e.charCode;

45     } else {

46         return e.keyCode;

47     }

48 }

浏览器检测

View Code

var client = function(){



    //rendering engines

    var engine = {            

        ie: 0,

        gecko: 0,

        webkit: 0,

        khtml: 0,

        opera: 0,



        //complete version

        ver: null  

    };

    

    //browsers

    var browser = {

        

        //browsers

        ie: 0,

        firefox: 0,

        safari: 0,

        konq: 0,

        opera: 0,

        chrome: 0,



        //specific version

        ver: null

    };



    

    //platform/device/OS

    var system = {

        win: false,

        mac: false,

        x11: false,

        

        //mobile devices

        iphone: false,

        ipod: false,

        ipad: false,

        ios: false,

        android: false,

        nokiaN: false,

        winMobile: false,

        

        //game systems

        wii: false,

        ps: false 

    };    



    //detect rendering engines/browsers

    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);

        

        //figure out if it's Chrome or Safari

        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 {

            //approximate version

            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);

        

        //determine if it's Firefox

        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);

    }

    

    //detect browsers

    browser.ie = engine.ie;

    browser.opera = engine.opera;

    



    //detect 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 systems

    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"];

            }

        }

    }

    

    //mobile devices

    system.iphone = ua.indexOf("iPhone") > -1;

    system.ipod = ua.indexOf("iPod") > -1;

    system.ipad = ua.indexOf("iPad") > -1;

    system.nokiaN = ua.indexOf("NokiaN") > -1;

    

    //windows mobile

    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"]);

        }

    }

    

    

    //determine iOS version

    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;  //can't really detect - so guess

        }

    }

    

    //determine Android version

    if (/Android (\d+\.\d+)/.test(ua)){

        system.android = parseFloat(RegExp.$1);

    }

    

    //gaming systems

    system.wii = ua.indexOf("Wii") > -1;

    system.ps = /playstation/i.test(ua);

    

    //return it

    return {

        engine:     engine,

        browser:    browser,

        system:     system        

    };



}();

判断浏览器的名称、版本号、操作系统

View Code

var BrowserDetect = {

    init: function () {

        this.browser = this.searchString(this.dataBrowser) || "An unknown browser";

        this.version = this.searchVersion(navigator.userAgent)

            || this.searchVersion(navigator.appVersion)

            || "an unknown version";

        this.OS = this.searchString(this.dataOS) || "an unknown OS";

    },

    searchString: function (data) {

        for (var i=0;i<data.length;i++)    {

            var dataString = data[i].string;

            var dataProp = data[i].prop;

            this.versionSearchString = data[i].versionSearch || data[i].identity;

            if (dataString) {

                if (dataString.indexOf(data[i].subString) != -1)

                    return data[i].identity;

            }

            else if (dataProp)

                return data[i].identity;

        }

    },

    searchVersion: function (dataString) {

        var index = dataString.indexOf(this.versionSearchString);

        if (index == -1) return;

        return parseFloat(dataString.substring(index+this.versionSearchString.length+1));

    },

    dataBrowser: [

        {

            string: navigator.userAgent,

            subString: "Chrome",

            identity: "Chrome"

        },

        {     string: navigator.userAgent,

            subString: "OmniWeb",

            versionSearch: "OmniWeb/",

            identity: "OmniWeb"

        },

        {

            string: navigator.vendor,

            subString: "Apple",

            identity: "Safari",

            versionSearch: "Version"

        },

        {

            prop: window.opera,

            identity: "Opera",

            versionSearch: "Version"

        },

        {

            string: navigator.vendor,

            subString: "iCab",

            identity: "iCab"

        },

        {

            string: navigator.vendor,

            subString: "KDE",

            identity: "Konqueror"

        },

        {

            string: navigator.userAgent,

            subString: "Firefox",

            identity: "Firefox"

        },

        {

            string: navigator.vendor,

            subString: "Camino",

            identity: "Camino"

        },

        {        // for newer Netscapes (6+)

            string: navigator.userAgent,

            subString: "Netscape",

            identity: "Netscape"

        },

        {

            string: navigator.userAgent,

            subString: "MSIE",

            identity: "Internet Explorer",

            versionSearch: "MSIE"

        },

        {

            string: navigator.userAgent,

            subString: "Gecko",

            identity: "Mozilla",

            versionSearch: "rv"

        },

        {         // for older Netscapes (4-)

            string: navigator.userAgent,

            subString: "Mozilla",

            identity: "Netscape",

            versionSearch: "Mozilla"

        }

    ],

    dataOS : [

        {

            string: navigator.platform,

            subString: "Win",

            identity: "Windows"

        },

        {

            string: navigator.platform,

            subString: "Mac",

            identity: "Mac"

        },

        {

               string: navigator.userAgent,

               subString: "iPhone",

               identity: "iPhone/iPod"

        },

        {

            string: navigator.platform,

            subString: "Linux",

            identity: "Linux"

        }

    ]



};

BrowserDetect.init();







alert(BrowserDetect.browser); //名称

alert(BrowserDetect.version); //版本

alert(BrowserDetect.OS) //系统