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 = "mac_ie.css";
}
	else if (ns) {
			fName = "mac_ns.css";
	}
}
else{
	if (ie) {
			fName = "win_ie.css";
	}
	else if (ns) {
			fName = "win_ns.css";
	}
}

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