//crossroad to CSS files
if(navigator.userAgent.indexOf('Mac') != -1){
	//for Macintosh
	document.write('<link rel="stylesheet" type="text/css" href="../CSS/mac.css" title="css for mac-nn">');
}else if(e4){
	//for Windows
	document.write('<link rel="stylesheet" type="text/css" href="../CSS/win_ie.css" title="css for win-ie">');
}else if(n4){
	//for Windows
	document.write('<link rel="stylesheet" type="text/css" href="../CSS/win_nn.css" title="css for win-nn">');
	document.close();
}else if(n6){
	//for Windows
	document.write('<link rel="stylesheet" type="text/css" href="../CSS/win_nn.css" title="css for win-nn">');
}