var x11 = navigator.appVersion.indexOf('X11');

if((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )){
  if((navigator.appVersion.indexOf("Macintosh"))!= -1){
    document.write('<link rel="stylesheet" href="/style/e3_y.css" type="text/css"/>')
  }else{
    document.write('<link rel="stylesheet" href="/style/e3_ye.css" type="text/css"/>')
  }
}
else
  if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 4)){
    if((navigator.appVersion.indexOf("Macintosh"))!= -1){
      document.write('<link rel="stylesheet" href="/style/e3_y.css" type="text/css"/>')
    }else 
      if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 5)){
        document.write('<link rel="stylesheet" href="/style/e3_y.css" type="text/css"/>')
      }else 
        if (x11 != -1){
          document.write('<link rel="stylesheet" href="/style/e3_y.css" type="text/css"/>')
        }else{
          document.write('<link rel="stylesheet" href="/style/e3_yn.css" type="text/css"/>')
        }
  }else{
    document.write('<link rel="stylesheet" href="/style/e3_y.css" type="text/css"/>')
  }