// check user agent


if(navigator.appName.indexOf("Netscape") > -1 && navigator.appVersion.charAt(0) <= 4){ 
css_type = "nn";
} 
else if(navigator.appName.indexOf("Netscape") > -1 && navigator.appVersion.charAt(0) > 4){ 
css_type = "default";
}

if (navigator.appName.indexOf('Microsoft') != -1) {
	css_type = "default";
}

if ((navigator.userAgent.indexOf('Mac') != -1)) {
	if ((navigator.userAgent.indexOf('Mozilla/5') != -1)) {
		css_type += "";
	} else {
		css_type += "_mac";
	}
} else {
	css_type += "";
}

doc_path = document.location.href;

if ((doc_path.indexOf('index.html') != -1) || (doc_path.charAt(doc_path.length-1) == "/")) {
	add_path = "";
} else {
	add_path = "";
}

link_tag = '<link rel="stylesheet" type="text/css" href="' + add_path + 'css/font_' + css_type + '.css">';

//alert(link_tag);

document.write(link_tag);