fName = "";
br = navigator.appName.toUpperCase();
os = navigator.userAgent.toUpperCase();
if (os.indexOf("MAC") >= 0){
    if (br.indexOf("NETSCAPE") >= 0){
        fName = "./css/mns.css";
    }else{
        fName = "./css/mie.css";
    }
}else{
    if (br.indexOf("NETSCAPE") >= 0){
        fName = "./css/wns.css";
    }else{
        fName = "./css/wie.css";
    }
}
document.write("<link rel='stylesheet' href='"+fName+"' type='text/css'>");