// set Variable
	var Agent = navigator.userAgent;
	var cssDir = 'css/';
	var cssTags = '<link rel="stylesheet" type="text/css" href="';
	var flag = null;

// CSS deverge for Cross Platform & Cross Browser
if (Agent.indexOf('Win') != -1) {
	if (document.all) { // Win_IE
		flag = "ie_win";
		document.write(cssTags + cssDir + flag + '.css" title="ie_win.css">');
	} else { // Win_NN
		flag = "nn_win";
		document.write(cssTags + cssDir + flag + '.css" title="nn_win.css">');
	}
}

if (Agent.indexOf('Mac') != -1) {
	if (document.all) { // Mac_IE
		flag = "ie_mac";
		document.write(cssTags + cssDir + flag + '.css" title="ie_mac.css">');
	} else { // Mac_NN
		flag = "nn_mac";
		document.write(cssTags + cssDir + flag + '.css" title="nn_mac.css">');
	}
}