browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
var agent = navigator.userAgent;

if ((browserVer <5) &&(browserName == "Netscape")) {
	document.writeln("<link rel=stylesheet type=text/css href=\"/css/nn4.css\">");
}
else {document.writeln("<link rel=stylesheet type=text/css href=\"/css/ie4.css\">");
}