//css set
str = navigator.appName.toUpperCase();
if (str.indexOf('EXPLORER') != -1) {
	str2 = navigator.userAgent.toUpperCase();
	if (str2.indexOf('WIN') != -1) {
		document.writeln('<LINK REL=\"stylesheet\" HREF=\"/lib/main_ie_w.css\">');
	} else {
		document.writeln('<LINK REL=\"stylesheet\" HREF=\"/lib/main_ie_m.css\">');
	}
} else {
	str2 = navigator.userAgent.toUpperCase();
	if (str2.indexOf('WIN') != -1) {
		document.writeln('<LINK REL=\"stylesheet\" HREF=\"/lib/main_nn_w.css\">');
	} else {
		document.writeln('<LINK REL=\"stylesheet\" HREF=\"/lib/main_nn_m.css\">');
	}
}