//
var agent = navigator.userAgent;
var appve = navigator.appVersion;
var appna = navigator.appName;
var userOs = null;
var browser = null;
var version = null;
var cssSrc = null;
//OS????
if( agent.indexOf('Win') != -1 ){
	userOs = "Win";
}
else if( agent.indexOf('Mac') != -1 ){
	userOs = "Mac";
}
else{
	userOs = "other";
}
//?u???E?U????
if( appna == "Microsoft Internet Explorer" ){
	browser = "MSIE";
	version = agent.substring((agent.indexOf('MSIE') + 5),(agent.indexOf('MSIE') + 8));
}
else if( appna == "Netscape" ){
	browser = "NN";
	version = appve.substring( 0,3 );
}
// ?X?^?C???V?[?g?U??????
var cssSlect ;
if ( userOs == "Mac" ){
	cssSlect = '<link rel="stylesheet" type="text/css" href="styles/font_mac.css">';
}
else if ( userOs == "Win" && browser == "NN" ){
	cssSlect = '<link rel="stylesheet" type="text/css" href="styles/font_win_nn.css">';
}
else if ( userOs == "Win" && browser == "MSIE" ){
	cssSlect = '<link rel="stylesheet" type="text/css" href="styles/font_win_ie.css">';
}
else{
	cssSlect = '<link rel="stylesheet" type="text/css" href="styles/font_win_other.css">';
}
document.write( cssSlect ) ;