var dir = "/";
var detect = navigator.userAgent.toLowerCase();
var version = parseInt(navigator.appVersion);

if(navigator.appName.indexOf("Netscape") != -1) {
	if(detect.indexOf("mac") == -1 || version >= 5) {
		//alert("I'm using ns.css");
		document.write('<link rel=stylesheet href="'+dir+'css/ns.css" type="text/css">');
	} else {
		//alert("I'm using nsMAC.css");
		document.write('<link rel=stylesheet href="'+dir+'css/nsMAC.css" type="text/css">');
	} 
} else {
	if(navigator.appName.indexOf("Opera") != -1 && detect.indexOf("mac") == -1) {
		//alert("I'm using ns.css");
		document.write('<link rel=stylesheet href="'+dir+'css/ns.css" type="text/css">');
	} else {
		//alert("I'm using ie.css");
		document.write('<link rel=stylesheet href="'+dir+'css/ie.css" type="text/css">');
	}
}