if ((navigator.appVersion.indexOf("Mac") != -1) &&(navigator.appName.indexOf("Netscape") == -1)) { // Mac IE
document.write("<LINK REL='stylesheet' href='../css/mac.css' TYPE='text/css'>");
}
else if ((navigator.appName.indexOf("Netscape") != -1)) { // Mac NN & Windows NN
document.write("<LINK REL='stylesheet' href='../css/netscape.css' type='text/css'>");
}
else { // Windows IE
document.write("<LINK REL='stylesheet' href='../css/win.css' type='text/css'>");
}