// Browser-Name feststellen und in Variable schreiben
var browserName = navigator.appName;
var browserVersion = parseInt(navigator.appVersion);
var browser;

if (browserName == "Netscape" && browserVersion == 5) {
    browser = "nn6";
}
else if (browserName == "Netscape" && browserVersion == 4) {
    browser = "nn4";
}
else if (browserName == "Microsoft Internet Explorer" && 
         browserVersion == 4 && 
         navigator.appVersion.indexOf("MSIE 6.0") != -1) {
    browser = "ie6";  
}
else if (browserName == "Microsoft Internet Explorer" && 
         browserVersion == 4 && 
         navigator.appVersion.indexOf("MSIE 5.5") != -1) {
    browser = "ie55";
}
else if (browserName == "Microsoft Internet Explorer" && 
         browserVersion == 4 && 
         navigator.appVersion.indexOf("MSIE 5.0") != -1) {
    browser = "ie5";
}
else if (browserName == "Microsoft Internet Explorer" 
         && browserVersion == 4) {
    browser = "ie4";
}
else if (browserName == "Netscape" && browserVersion == 3) {
	browser = "nn3";
}
else if (browserName == "Microsoft Internet Explorer" &&
		 browserVersion == 2) {
	browser = "ie3";
}

// Umleitung zur Error-Seite
if (browser == "nn4" || browser == "nn3" || browser == "ie4" || browser == "ie3")
	{window.location="error/error.htm"
}
else if (screen.width < 800 || screen.height < 600)
	window.location="error/error_res.htm"