浏览器检测JS代码(兼容目前各大主流浏览器)

var BrowserMatch = {
    init: function () {
        this.browser = this.getBrowser().browser || "An Unknown Browser";
        this.version = this.getBrowser().version || "An Unknown Version";
        this.OS = this.getOS() || "An Unknown OS";
    },
    getOS:function(){
        if(navigator.platform.indexOf("Win")!= -1) return "Windows";
        if(navigator.platform.indexOf("Mac")!= -1) return "Mac";
        if(navigator.platform.indexOf("Linux")!= -1) return "Linux";
        if(navigator.userAgent.indexOf("iPhone")!= -1) return "iPhone/iPod";
    },
    getBrowser:function () {
        var rMsie = /(msie\s|trident\/7)([\w\.]+)/;
        var rTrident = /(trident)\/([\w.]+)/;
        var rFirefox = /(firefox)\/([\w.]+)/; 
        var rOpera = /(opera).+version\/([\w.]+)/;
        var rNewOpera = /(opr)\/(.+)/;
        var rChrome = /(chrome)\/([\w.]+)/;
        var rSafari = /version\/([\w.]+).*(safari)/;
        var ua = navigator.userAgent.toLowerCase();
        var matchBS,matchBS2;
        matchBS = rMsie.exec(ua);
        if (matchBS != null) {
            matchBS2 = rTrident.exec(ua);
            if (matchBS2 != null){
                switch (matchBS2[2]){
                    case "4.0": return { browser : "IE", version : "8" };break;
                    case "5.0": return { browser : "IE", version : "9" };break;
                    case "6.0": return { browser : "IE", version : "10" };break;
                    case "7.0": return { browser : "IE", version : "11" };break;
                    default:return { browser : "IE", version : "Undefined" };
                }
            }else{
                return {browser : "IE", version : matchBS[2] || "0" };
            }
        }
        matchBS = rFirefox.exec(ua);   
        if ((matchBS != null)&&(!(window.attachEvent))&&(!(window.chrome))&&(!(window.opera))) {   
            return { browser : matchBS[1] || "", version : matchBS[2] || "0" };
        }
        matchBS = rOpera.exec(ua);                 
        if ((matchBS != null)&&(!(window.attachEvent))) {         
            return { browser : matchBS[1] || "", version : matchBS[2] || "0" };
        }
        matchBS = rChrome.exec(ua);    
        if ((matchBS != null)&&(!!(window.chrome))&&(!(window.attachEvent))) {
            matchBS2 = rNewOpera.exec(ua);             
            if(matchBS2 == null){
                return { browser : matchBS[1] || "", version : matchBS[2] || "0" };
            }else{
                return { browser : "Opera", version : matchBS2[2] || "0" };
            }    
        }
        matchBS = rSafari.exec(ua);                   
        if ((matchBS != null)&&(!(window.attachEvent))&&(!(window.chrome))&&(!(window.opera))) {      
            return { browser : matchBS[2] || "", version : matchBS[1] || "0" };
        }                      
    }
};    
BrowserMatch.init();

调用方法：(首先得引入js文件，大家应该都懂的)

获取浏览器名:BrowserMatch.browser;

获取浏览器版本:BrowserMatch.version;

获取所处操作系统:BrowserMatch.OS;