【转】通过js获取系统版本以及浏览器版本

 function getOsInfo() {
     var userAgent = navigator.userAgent.toLowerCase();
     var name = 'Unknown';
     var version = "Unknown";
     if(userAgent.indexOf("win") > -1) {
         name = "Windows";
         if(userAgent.indexOf("windows nt 5.0") > -1) {
             version = "Windows 2000";
         } else if(userAgent.indexOf("windows nt 5.1") > -1 || userAgent.indexOf("windows nt 5.2") > -1) {
             version = "Windows XP";
         } else if(userAgent.indexOf("windows nt 6.0") > -1) {
             version = "Windows Vista";
         } else if(userAgent.indexOf("windows nt 6.1") > -1 || userAgent.indexOf("windows 7") > -1) {
             version = "Windows 7";
         } else if(userAgent.indexOf("windows nt 6.2") > -1 || userAgent.indexOf("windows 8") > -1) {
             version = "Windows 8";
         } else if(userAgent.indexOf("windows nt 6.3") > -1) {
             version = "Windows 8.1";
         } else if(userAgent.indexOf("windows nt 6.2") > -1 || userAgent.indexOf("windows nt 10.0") > -1) {
             version = "Windows 10";
         } else {
             version = "Unknown";
         }
     } else if(userAgent.indexOf("iphone") > -1) {
         name = "Iphone";
     } else if(userAgent.indexOf("mac") > -1) {
         name = "Mac";
     } else if(userAgent.indexOf("x11") > -1 || userAgent.indexOf("unix") > -1 || userAgent.indexOf("sunname") > -1 || userAgent.indexOf("bsd") > -1) {
         name = "Unix";
     } else if(userAgent.indexOf("linux") > -1) {
         if(userAgent.indexOf("android") > -1) {
             name = "Android"
         } else {
             name = "Linux";
         }

     } else {
         name = "Unknown";
     }
     var os = new Object();
     os.name =  name;
     os.version = version;
     return os;
     //document.write("系统：" + os.name + "版本:" + os.name)
 }
 function getBrowerInfo(){
     var Browser = Browser || (function(window) {
                     var document = window.document,
                         navigator = window.navigator,
                         agent = navigator.userAgent.toLowerCase(),
                         //IE8+支持.返回浏览器渲染当前文档所用的模式
                         //IE6,IE7:undefined.IE8:8(兼容模式返回7).IE9:9(兼容模式返回7||8)
                         //IE10:10(兼容模式7||8||9)
                         IEMode = document.documentMode,
                         //chorme
                         chrome = window.chrome || false,
                         System = {
                             //user-agent
                             agent: agent,
                             //是否为IE
                             isIE: /trident/.test(agent),
                             //Gecko内核
                             isGecko: agent.indexOf("gecko") > 0 && agent.indexOf("like gecko") < 0,
                             //webkit内核
                             isWebkit: agent.indexOf("webkit") > 0,
                             //是否为标准模式
                             isStrict: document.compatMode === "CSS1Compat",
                             //是否支持subtitle
                             supportSubTitle: function() {
                                 return "track" in document.createElement("track");
                             },
                             //是否支持scoped
                             supportScope: function() {
                                 return "scoped" in document.createElement("style");
                             },

                             //获取IE的版本号
                             ieVersion: function() {
                                 var rMsie  = /(msie\s|trident.*rv:)([\w.]+)/;
                                 var ma = window.navigator.userAgent.toLowerCase()
                                 var  match  = rMsie.exec(ma);  
                                 try {
                                     return match[2];
                                 } catch (e) {
 //                                    console.log("error");
                                     return IEMode;
                                 }
                             },
                             //Opera版本号
                             operaVersion: function() {
                                 try {
                                     if (window.opera) {
                                         return agent.match(/opera.([\d.]+)/)[1];
                                     } else if (agent.indexOf("opr") > 0) {
                                         return agent.match(/opr\/([\d.]+)/)[1];
                                     }
                                 } catch (e) {
 //                                    console.log("error");
                                     return 0;
                                 }
                             }
                         }; 

                     try {
                         //浏览器类型(IE、Opera、Chrome、Safari、Firefox)
                         System.type = System.isIE ? "IE" :
                             window.opera || (agent.indexOf("opr") > 0) ? "Opera" :
                             (agent.indexOf("chrome") > 0) ? "Chrome" :
                             //safari也提供了专门的判定方式
                             window.openDatabase ? "Safari" :
                             (agent.indexOf("firefox") > 0) ? "Firefox" :
                             'unknow';

                         //版本号
                         System.version = (System.type === "IE") ? System.ieVersion() :
                             (System.type === "Firefox") ? agent.match(/firefox\/([\d.]+)/)[1] :
                             (System.type === "Chrome") ? agent.match(/chrome\/([\d.]+)/)[1] :
                             (System.type === "Opera") ? System.operaVersion() :
                             (System.type === "Safari") ? agent.match(/version\/([\d.]+)/)[1] :
                             "0";

                         //浏览器外壳
                         System.shell = function() {

                             if (agent.indexOf("edge") > 0) {
                                 System.version = agent.match(/edge\/([\d.]+)/)[1] || System.version;
                                 return "edge浏览器";
                             }
                             //遨游浏览器
                             if (agent.indexOf("maxthon") > 0) {
                                 System.version = agent.match(/maxthon\/([\d.]+)/)[1] || System.version;
                                 return "傲游浏览器";
                             }
                             //QQ浏览器
                             if (agent.indexOf("qqbrowser") > 0) {
                                 System.version = agent.match(/qqbrowser\/([\d.]+)/)[1] || System.version;
                                 return "QQ浏览器";
                             }

                             //搜狗浏览器
                             if (agent.indexOf("se 2.x") > 0) {
                                 return '搜狗浏览器';
                             }

                             //Chrome:也可以使用window.chrome && window.chrome.webstore判断
                             if (chrome && System.type !== "Opera") {
                                 var external = window.external,
                                     clientInfo = window.clientInformation,
                                     //客户端语言:zh-cn,zh.360下面会返回undefined
                                     clientLanguage = clientInfo.languages;

                                 //猎豹浏览器:或者agent.indexOf("lbbrowser")>0
                                 if (external && 'LiebaoGetVersion' in external) {
                                     return '猎豹浏览器';
                                 }
                                 //百度浏览器
                                 if (agent.indexOf("bidubrowser") > 0) {
                                     System.version = agent.match(/bidubrowser\/([\d.]+)/)[1] ||
                                         agent.match(/chrome\/([\d.]+)/)[1];
                                     return "百度浏览器";
                                 }
                                 //360极速浏览器和360安全浏览器
                                 if (System.supportSubTitle() && typeof clientLanguage === "undefined") {
                                     //object.key()返回一个数组.包含可枚举属性和方法名称
                                     var storeKeyLen = Object.keys(chrome.webstore).length,
                                         v8Locale = "v8Locale" in window;
                                     return storeKeyLen > 1 ? '360极速浏览器' : '360安全浏览器';
                                 }
                                 return "Chrome";
                             }
                             return System.type;
                         };

                         //浏览器名称(如果是壳浏览器,则返回壳名称)
                         System.name = System.shell();
                         //对版本号进行过滤过处理
                         //    System.version = System.versionFilter(System.version);

                     } catch (e) {
 //                        console.log(e.message);
                     }
                     return {
                         client: System
                     };

                 })(window);
                 if (Browser.client.name == undefined || Browser.client.name=="") {
                     Browser.client.name = "Unknown";
                     Browser.client.version = "Unknown";
                 }else if(Browser.client.version == undefined){
                     Browser.client.version = "Unknown";
                 }
 //                document.write(Browser.client.name + " " + Browser.client.version);
         return Browser ;
 }

自己备用