if(navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion >= "4")
window.location.replace('http://www.d-jukic.de/cz/index.html');
else if(navigator.appCodeName == "Mozilla" && navigator.appVersion < "4" )
 window.location.replace('http://www.d-jukic.de/n3/cz/index.html');
else if(navigator.appCodeName == "Mozilla" && navigator.appVersion >= "4")
 window.location.replace('http://www.d-jukic.de/cz/index.html');
else if(navigator.appCodeName == "Microsoft Internet Explorer" && navigator.appVersion < "4" )
 window.location.replace('http://www.d-jukic.de//n3/cz/index.html');