mac = (navigator.appVersion.indexOf("Mac") != -1) ?true:false;
ie = (navigator.appName.charAt(0) == "M") ?true:false;
ns = (navigator.appName.charAt(0) == "N") ?true:false;

if (mac) {
	if (ie){
		fName = "./css/style_ie.css";
	} else if (ns){
		fName = "./css/style_ns.css";
	}
} else {
	if (ie){
		fName = "./css/style_ie.css";
	} else if (ns){
		fName = "./css/style_ns.css";
	}
}

if (fName != null){
	document.write("<LINK REL='stylesheet' HREF='"+fName+"' TYPE='text/css'>");
}