// 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 = "wie";
document.open();
document.write(cssTags + cssDir + flag + '.css" title="WinIE_style">');
document.close();
} else { // Win_NS
flag = "wns";
document.open();
document.write(cssTags + cssDir + flag + '.css" title="WinNS_style">');
document.close();
}
}

if (Agent.indexOf('Mac') != -1) {
if (document.all) { // Mac_IE
flag = "mie";
document.open();
document.write(cssTags + cssDir + flag + '.css" title="MacIE_style">');
document.close();
} else { // Mac_NS
flag = "mns";
document.open();
document.write(cssTags + cssDir + flag + '.css" title="MacNS_style">');
document.close();
}
}

// for debug
/*
alert(flag);
*/