Qwrap browser Detection

Sometimes you need to do different things based on different browsers.
This requires us to check the browser and version.
Qwrap BrowserCodeAs follows.

 VaR  QW  =  {};
  /*  *
* @ Class browser JS running environment, browser and version information. (Browser only performs sniffing Based on useragent, which is not rigorous .)
* @ Singleton
* @ Namespace QW
  */  
QW. Browser  =  Function  (){
  VaR  Na =  Window. Navigator,
UA  =  Na. useragent. tolowercase (),
Browsertester  =     /  (MSIE | WebKit | gecko | presto | opera | safari | Firefox | chrome | Maxthon) [\/] ([\ D.] +)  /  Ig,
Browser  =  {Platform: Na. Platform };
UA. Replace (browsertester,  Function  (A, B, C ){
 VaR  Blower  =  B. tolowercase ();
Browser [blower]  =  C;
});
  If  (Browser. Opera ){  //  Opera9.8 and later versions  
  UA. Replace (  /  Opera. * version \/([\ D.] +)  /  , Function  (A, B) {browser. Opera  =  B ;});
}
  If  (Browser. MSIE ){
Browser. ie  =  Browser. MSIE;
  VaR  V  =  Parseint (browser. MSIE );
Browser. IE6  =  V  =  6 ;
Browser. IE7  =  V  =  7  ;
Browser. IE8  =  V  =  8  ;
Browser. ie9  =  V  =  9  ;
}
  Return Browser;
}();
  If  (QW. browser. ie ){  Try  {Document.exe ccommand (  "  Backgroundimagecache  "  ,  False  ,  True  );}  Catch  (E ){}} 

Test code:

View code

<  Html  >  
  <  Body  >  
  <  Script  >  
  VaR  QW  = {};
  /*  *
* @ Class browser JS running environment, browser and version information. (Browser only performs sniffing Based on useragent, which is not rigorous .)
* @ Singleton
* @ Namespace QW
  */  
QW. Browser  =  Function  (){
  VaR  Na =  Window. Navigator,
UA  =  Na. useragent. tolowercase (),
Browsertester  =     /  (MSIE | WebKit | gecko | presto | opera | safari | Firefox | chrome | Maxthon) [\/] ([\ D.] +)  /  Ig,
Browser =  {Platform: Na. Platform };
UA. Replace (browsertester,  Function  (A, B, C ){
  VaR  Blower  =  B. tolowercase ();
Browser [blower]  =  C;
});
 If  (Browser. Opera ){  //  Opera9.8 and later versions  
  UA. Replace (  /  Opera. * version \/([\ D.] +)  /  ,  Function (A, B) {browser. Opera  =  B ;});
}
  If  (Browser. MSIE ){
Browser. ie  =  Browser. MSIE;
  VaR  V  = Parseint (browser. MSIE );
Browser. IE6  =  V  =  6  ;
Browser. IE7  =  V  =  7  ;
Browser. IE8 =  V  =  8  ;
Browser. ie9  =  V  =  9  ;
}
  Return Browser;
}();
  If  (QW. browser. ie ){  Try  {Document.exe ccommand (  "  Backgroundimagecache  "  ,  False  , True  );}  Catch  (E ){}}
  </  Script  >  

  <  Script  >  
  Function  Print (o ){
 VaR  Html  =  [];
  For  (  VaR  I  In  O) HTML. Push (  '  ( '  +  (  Typeof  O [I])  +  '  )  '  +  I  + '  :  '  +  O [I]);
Document. Write (html. Join (  '  <Br/>  '  ));
}
Print (QW. browser );
  </  Script  > 
  </  Body  >  
  </  Html  > 

The detection result is as follows: