if (navigator.userAgent.indexOf("Win") >= 0) {
	if (navigator.appName.indexOf("Microsoft") >= 0) {
		version="win-ie";
	} else {
		if (navigator.appVersion.charAt(0) >= 5) {
			version="win-moz";
		} else {
			version="win-nn";
		}
	}
} else {
	if (navigator.appName.indexOf("Microsoft") >= 0) {
		version="mac-ie";
	} else {
		if (navigator.appVersion.charAt(0) >= 5) {
			version="mac-moz";
		} else {
			version="mac-nn";
		}
	}
}
document.write('<link rel="stylesheet" type="text/css" href="css/'+version+'.css">')