javascript用户代理检测

来源：互联网发布：京瓷网络扫描设置编辑：程序博客网时间：2024/05/21 18:49
<script type="text/javascript">var client = function(){        //呈现引擎        var engine = {                ie: 0,                gecko: 0,                webkit: 0,                khtml: 0,                opera: 0,                //完整的版本号                ver: null        };        // 浏览器        var browser = {                //主要浏览器                ie: 0,                firefox: 0,                konq: 0,                chrome: 0,                safari: 0,                // 具体版本号                ver: null        };        // 平台、设备和操作系统        var system = {                win: false,                mac: false,                x11: false,                // 移动设备                iphone: false,                ipod: false,                nokiaN: false,                winMobile: false,                macMobile: false,                // 游戏系统                wii: false,                ps: false        };        // 检测呈现引擎和浏览器        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);                // 确定是 Chrmoe 还是 Safari                if(/Chrmoe\/(\S+)/.test(ua)){                        browser.ver = RegExp["$1"];                        browser.chrome = parseFloat(browser.ver);                } else if(/Version\/(\S+)/.test(ua)){                        browser.ver = RegExp["$1"];                        browser.safri = parseFloat(browser.ver);                } else {                        // 近似的确定版本号                        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) || /Knoqueror\/([^;]+)/.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);                // 确定是不是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);        }        // 检测浏览器        browser.ie = engine.ie;        browser.opera = engine.opera;        // 检测平台        var p = navigator.platform;        system.win = p.indexOf("Win") == 0;        system.mac = p.indexOf("Mac") == 0;        system.x11 = (p == "X11") || (p.indexOf("Linux") == 0 );        // 检测 windows操作系统    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";                                                brreak;                                        case "5.1":                                                system.win = "xp";                                                break;                                        case "6.0":                                                system.win = "Vista";                                                break;                                        case "6.1":                                                system.win = " Win7";                                                break;                                        default:                                                system.win = "NT";                                                break;                                }                        } else if (RegExp["$1"]){                                system.wein = "ME";                        } else {                                system.win = RegExp["$1"];                        }                }    }          // 移动设备        system.iphone = ua.indexOf("iPhone") >  -1;        system.ipod = ua.indexOf("iPod") > -1;        system.nokiaN = ua.indexOf("NokiaN") > -1;        system.winMobile = (system.win == "CE");        system.macMobile = (system.iphone || system.ipod);        // 游戏系统        system.wii = ua.indexOf("Wii") > -1;        system.ps = /playstation/i.test(ua);        // 返回这些对象        return {                engine: engine,                browser: browser,                system: system        };}();if (client.browser.ie == "0"){        alert("请选择使用IE浏览器！");} else {        alert("您现在使用的是IE浏览器");}</script>
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