function brDetection() {
var brAgent = navigator.userAgent.toLowerCase();
this.brVer = parseInt(navigator.appVersion);
this.brVerDot = parseFloat(navigator.appVersion);
this.ns = ((brAgent.indexOf('mozilla') != -1) && ((brAgent.indexOf('spoofer') == -1) && (brAgent.indexOf('compatible') == -1)));
this.ns4 = (this.ns && (this.brVer >= 4));
this.ie = (brAgent.indexOf("msie") != -1);
this.mac = (brAgent.indexOf("mac") != -1);
this.win = (brAgent.indexOf("win") != -1);
}
var brID = new brDetection();
if ((brID.mac) && (brID.ie)) {
document.write ('<link rel="stylesheet" type="text/css" href="css/mac_ie.css">')
}
if ((brID.mac) && (brID.ns4)) {
document.write ('<link rel="stylesheet" type="text/css" href="css/mac_nc.css">')
}
if ((brID.win) && (brID.ns4)) {
document.write ('<link rel="stylesheet" type="text/css" href="css/win_nc.css">')
}
if ((brID.win) && (brID.ie)) {
document.write ('<link rel="stylesheet" type="text/css" href="css/win_ie.css">')
}