javascript实现获取浏览器版本、操作系统类型

/**
 * Created by Administrator on 15-1-12.
 */
function BroswerUtil() {
}
BroswerUtil = {
  //检测浏览器版本
  getBrowserVersion: function () {
    var agent = navigator.userAgent.toLowerCase();
    var arr = [];
    var Browser = "";
    var Bversion = "";
    var verinNum = "";
    //IE
    if (agent.indexOf("msie") > 0) {
      var regStr_ie = /msie [d.]+;/gi;
      Browser = "IE";
      Bversion = "" + agent.match(regStr_ie)
    }
    //firefox
    else if (agent.indexOf("firefox") > 0) {
      var regStr_ff = /firefox/[d.]+/gi;
      Browser = "firefox";
      Bversion = "" + agent.match(regStr_ff);
    }
    //Chrome
    else if (agent.indexOf("chrome") > 0) {
      var regStr_chrome = /chrome/[d.]+/gi;
      Browser = "chrome";
      Bversion = "" + agent.match(regStr_chrome);
    }
    //Safari
    else if (agent.indexOf("safari") > 0 && agent.indexOf
("chrome") < 0) {
      var regStr_saf = /version/[d.]+/gi;
      Browser = "safari";
      Bversion = "" + agent.match(regStr_saf);
    }
    //Opera
    else if (agent.indexOf("opera") >= 0) {
      var regStr_opera = /version/[d.]+/gi;
      Browser = "opera";
      Bversion = "" + agent.match(regStr_opera);
    } else {
      var browser = navigator.appName;
      if (browser == "Netscape") {
        var version = agent.split(";");
        var trim_Version = version[7].replace(/[ ]/g, 
"");
        var rvStr = trim_Version.match(/
[d.]/g).toString();
        var rv = rvStr.replace(/[,]/g, "");
        Bversion = rv;
        Browser = "IE"
      }
    }
    verinNum = (Bversion + "").replace(/[^0-9.]/ig, "");
    arr.push(Browser);
    arr.push(verinNum);
    return arr;
  },
  //检测是否是XX浏览器
  WB: (function () {
    var UserAgent = navigator.userAgent.toLowerCase();
    return {
      isIE6: /msie 6.0/.test(UserAgent), // IE6
      isIE7: /msie 7.0/.test(UserAgent), // IE7
      isIE8: /msie 8.0/.test(UserAgent), // IE8
      isIE9: /msie 9.0/.test(UserAgent), // IE9
      isIE10: /msie 10.0/.test(UserAgent), // IE10
      isIE11: /msie 11.0/.test(UserAgent), // IE11
      isLB: /lbbrowser/.test(UserAgent), // 猎豹浏览器
      isUc: /ucweb/.test(UserAgent), // UC浏览器
      is360: /360se/.test(UserAgent), // 360浏览器
      isBaidu: /bidubrowser/.test(UserAgent), // 百度浏览器
      isSougou: /metasr/.test(UserAgent), // 搜狗浏览器
      isChrome: /chrome/.test(UserAgent.substr(-33, 6)), // 
Chrome浏览器
      isFirefox: /firefox/.test(UserAgent), // 火狐浏览器
      isOpera: /opera/.test(UserAgent), // Opera浏览器
      isSafire: /safari/.test(UserAgent) && !/chrome/.test
(UserAgent), // safire浏览器
      isQQ: /qqbrowser/.test(UserAgent)//qq浏览器
    };
  })(),
  //检测当前操作系统
  CurrentSystem: (function () {
    var system = {
      win: false,
      mac: false,
      xll: false,
      iphone: false,
      ipoad: false,
      ipad: false,
      ios: false,
      android: false,
      nokiaN: false,
      winMobile: false,
      wii: false,
      ps: false
    };
    var ua = navigator.userAgent;
    // 检测平台
    var p = navigator.platform;
    system.win = p.indexOf('Win') == 0;
    system.mac = p.indexOf('Mac') == 0;
    system.xll = (p.indexOf('Xll') == 0 || 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';
              break;
            case '5.1':
              system.win = 'XP';
              break;
            case '6.0':
              system.win = 'Vista';
              break;
            case '6.1':
              system.win = '7';
              break;
            case '6.2':
              system.win = '8';
              break;
            default:
              system.win = 'NT';
              break;
          }
        } else if (RegExp['$1'] == '9x') {
          system.win = 'ME';
        } else {
          system.win = RegExp['$1'];
        }
      }
    }
    // 移动设备
    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)/i.test(ua)) {
        system.win = 'Phone';
        system.winMobile = parseFloat(RegExp['$1']);
      }
    }
    // 检测IOS版本
    if (system.mac && ua.indexOf('Mobile') > -1) {
      if (/CPU (?:iPhone )?OS (d+_d+)/i.test(ua)) {
        system.ios = parseFloat(RegExp['$1'].replace('_', 
'.'));
      } else {
        system.ios = 2;    // 不能真正检测出来，所以
只能猜测
      }
    }
    // 检测Android版本
    if (/Android (d+.d+)/i.test(ua)) {
      system.android = parseFloat(RegExp['$1']);
    }
    // 游戏系统
    system.wii = ua.indexOf('Wii') > -1;
    system.ps = /PlayStation/i.test(ua);
    return {
      system: system
    }
  })()
}