browser = navigator.appName;
version = navigator.appVersion;
os = navigator.platform;
ie = "Microsoft Internet Explorer";
nn = "Netscape";
macbr=os.indexOf("Mac");
verbr=navigator.appVersion.indexOf("MSIE 4");

if (browser == nn && macbr=="0" && verbr=="-1") {
	document.write('<link rel=stylesheet type="text/css" href="../css/netscapemac.css" title=master>');
} 

else if (browser == nn && macbr=="-1"  && verbr=="-1") {
	document.write('<link rel=stylesheet type="text/css" href="../css/netscape.css" title=master>');
} 

else if (browser == ie && macbr=="0" && verbr!="-1" ) {
	document.write('<link rel=stylesheet type="text/css" href="../css/defaultmac.css" title=master>');
} 

else {
	document.write('<link rel=stylesheet type="text/css" href="../css/default.css" title=master>');
}