if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 ))
{
    if ((navigator.appVersion.indexOf("Macintosh"))!= -1)
    {
        document.write('<link rel="stylesheet" href="/css/other.css" type="text/css">')
    }
    else
    {
        document.write('<link rel="stylesheet" href="/css/ie.css" type="text/css">');
    }
}
else if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 4))
{
    if ((parseInt(navigator.appVersion) >= 4))
    {
        document.write('<link rel="stylesheet" href="/css/ie.css" type="text/css">');
    }
    else if ((navigator.appVersion.indexOf("Macintosh"))!= -1)
    {
        document.write('<link rel="stylesheet" href="/css/other.css" type="text/css">')
    }
    else
    {
        document.write('<link rel="stylesheet" href="/css/netscape.css" type="text/css">');
    }
}
else
{
    document.write('<link rel="stylesheet" href="/css/other.css" type="text/css">')
}