Browser detection methods

1. Navigator method:

CODE:
document.write('Browser Type: '+navigator.appName' ');
document.write('Browser Family and Version: '+navigator.appVersion+' ');


 Navigator alone can't separate incompatible NS 4 from NS 6 

 Navigator + version can separate NS4/6 but must be upgraded annually 


2. Family method:
 
familysniffer.htm detect browser by family -- write type


familysniffer.js.txt code can distinguish NS4 from NS6 ("gecko") 
but can't separate IE 4 from IE 5 or IE 6 (all IE 4 family)


3. Features method:


sniffer1.htm detect browser by features -- alertbox 


browsersniffer.js.txt code distinguishes three levels:
1) IE 5/6 or NS6 (getElementById)-- 2) NS4 (layers) -- 3) IE 4 (all) 



sniffer2.htm detect browser by features -- redirect demo


featuresniffer.js.txt code