// browser
var ns = (navigator.userAgent.indexOf("Gecko") > 0) ? 1 : 0;
//var ie = (navigator.userAgent.indexOf("MSIE") > 0) ? 1 : 0;
// platform
var mac = (navigator.userAgent.indexOf("Mac") > 0) ? 1 : 0;
//var nsA = (navigator.userAgent.indexOf("Gecko") > 0) ? 1 : 0;
//var opera = (navigator.userAgent.indexOf("Opera") > 0) ? 1 : 0;

if(mac==0) {
	if(ns==0) {
		document.write ('<link rel="stylesheet" type="text/css" href="css/pc_styles.css">');
	}else{
		document.write ('<link rel="stylesheet" type="text/css" href="css/pc_styles.css">');
	}
} else {
	if(ns==0) {
		document.write ('<link rel="stylesheet" type="text/css" href="css/mac_styles.css">');
	}else{
		document.write ('<link rel="stylesheet" type="text/css" href="css/mac_styles.css">');
	}
}