浏览器内核标识，依据 navigator.userAgent 判断。
mozilla 此属性在 DOM 树加载完成前即有效，可用于为特定浏览器设置 ready 事件。
参考文档：http://api.jquery.com/jQuery.browser/
待验证代码：
1 <SCRIPT language="JavaScript">
2 function myexplorer(){
3 var explorer = window.navigator.userAgent;
4 if (explorer.indexOf("QQBrowser")>=0 || explorer.indexOf("QQ")>=0){return myexplorer="腾讯QQ";
5 }else if(explorer.indexOf("Safari")>=0 && explorer.indexOf("MetaSr")>=0){return myexplorer="搜狗";
6 }else if (!!window.ActiveXObject || "ActiveXObject" in window){//IE
7 if (!window.XMLHttpRequest){return myexplorer="IE6";
8 }else if (window.XMLHttpRequest && !document.documentMode){return myexplorer="IE7";
9 }else if (!-[1,] && document.documentMode && !("msDoNotTrack" in window.navigator)){return myexplorer="IE8";
10 }else{//IE9 10 11
11 var hasStrictMode=(function(){"use strict";return this===undefined;}());
12 if (hasStrictMode){
13 if (!!window.attachEvent){return myexplorer="IE10";}else{return myexplorer="IE11";}
14 }else{
15 return myexplorer="IE9";
16 }
17 }
18 }else{//非IE
19 if (explorer.indexOf("LBBROWSER") >= 0){return myexplorer="猎豹";
20 }else if(explorer.indexOf("360ee")>=0){return myexplorer="360极速浏览器";
21 }else if(explorer.indexOf("360se")>=0){return myexplorer="360安全浏览器";
22 }else if(explorer.indexOf("se")>=0){return myexplorer="搜狗浏览器";
23 }else if(explorer.indexOf("aoyou")>=0){return myexplorer="遨游浏览器";
24 }else if(explorer.indexOf("qqbrowser")>=0){return myexplorer="QQ浏览器";
25 }else if(explorer.indexOf("baidu")>=0){return myexplorer="百度浏览器";
26 }else if(explorer.indexOf("Firefox")>=0){return myexplorer="火狐";
27 }else if(explorer.indexOf("Maxthon")>=0){return myexplorer="遨游";
28 }else if(explorer.indexOf("Chrome")>=0){return myexplorer="谷歌（或360伪装）";
29 }else if(explorer.indexOf("Opera")>=0){return myexplorer="欧朋";
30 }else if (explorer.indexOf("TheWorld") >= 0){return myexplorer="世界之窗";
31 }else if(explorer.indexOf("Safari")>=0){return myexplorer="苹果";
32
33 }else{return myexplorer="其他";
34 }
35 }
36 }</script>
37 <BR>
38 <SCRIPT>document.write("客户端浏览器是："+myexplorer());</script>