if (navigator.appName=="Microsoft Internet Explorer" && navigator.platform=="MacPPC") {
    document.write('<LINK rel="stylesheet" type="text/css" href="css/mac_ie.css">'); 
}
else
{
    if (navigator.appName=="Netscape" && navigator.platform=="MacPPC") {
        document.write('<LINK rel="stylesheet" type="text/css" href="css/mac_ns.css">');
    }
    else if (navigator.appName=="Microsoft Internet Explorer" && navigator.platform=="Win32") {
        document.write('<LINK rel="stylesheet" type="text/css" href="css/win_ie.css">');
    }
    else if (navigator.appName=="Netscape" && navigator.platform=="Win32") {
        document.write('<LINK rel="stylesheet" type="text/css" href="css/win_ns.css">');
    }
    else {
		document.write('<LINK rel="stylesheet" type="text/css" href="css/def.css">');
    }
}