if (navigator.appName == "Microsoft Internet Explorer") {
   document.write("<link rel=\"stylesheet\" href=\"fileadmin/css/main.css\" />");
}
else if (navigator.appName == "Konqueror") {
   document.write("<link rel=\"stylesheet\" href=\"fileadmin/css/konqueror.css\" />");
}
else if (navigator.appName == "Netscape" && navigator.platform == "MacPPC") {
   document.write("<link rel=\"stylesheet\" href=\"fileadmin/css/safari.css\" />");
}
else {
   document.write("<link rel=\"stylesheet\" href=\"fileadmin/css/noie.css\" />");
}