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 = /(msies|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();