if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt
(navigator.appVersion)>= 4 )) {
  document.write('<link rel="stylesheet" type="text/css" href="CSS/Style_IE.css">')}
else {
  if (navigator.appName == "Netscape"){
    if (parseInt(navigator.appVersion)>= 5 ){
      document.write('<link rel="stylesheet" type="text/css" href="CSS/Style.css">')}
    else {
      document.write('<link rel="stylesheet" type="text/css" href="CSS/Style.css">')}
    }
  else {
    document.write('<link rel="stylesheet" type="text/css" href="CSS/Style.css">')}
}