if (navigator.userAgent.indexOf("Win") >=0) {
	if (navigator.appName.charAt(0)=="M") {
		document.write('<link rel="stylesheet" type="text/css" href="ie.css">');
	}
	else {
		document.write('<link rel="stylesheet" type="text/css" href="win_nn.css">');
	}
}
else {
	if (navigator.appName.charAt(0)=="N") {
		document.write('<link rel="stylesheet" type="text/css" href="mac_nn.css">');
	}
	else {
		document.write('<link rel="stylesheet" type="text/css" href="ie.css">');
	}
}