var osName = navigator.platform.charAt(0);
var bzName = navigator.appName.charAt(0);
if(osName == "W"){
if(bzName == "N"){
	document.write('<link rel="stylesheet" type="text/css" href="css/win_nn.css">');
}else{
	document.write('<link rel="stylesheet" type="text/css" href="css/win_ie.css">');
	}
}else{
	if(bzName == "N"){
	document.write('<link rel="stylesheet" type="text/css" href="css/mac_nn.css">');
	}else{
	document.write('<link rel="stylesheet" type="text/css" href="css/mac_ie.css">');
	}
}