var vcheck = navigator.appVersion.charAt(0);
var ncheck = navigator.appName.charAt(0);
var IE4 = navigator.userAgent.indexOf("MSIE 4")>=0;
var NN7 = navigator.userAgent.indexOf("Netscape/7")>=0;
var Opera = navigator.userAgent.indexOf("Opera")>=0;
var Firefox = navigator.userAgent.indexOf("Firefox")>=0;
var Safari = navigator.userAgent.indexOf("Safari") != -1;
var mac = navigator.userAgent.indexOf("Mac")>=0;

// windows_ie5
if ((mac==false) && (ncheck=="M") && (vcheck>=4) && (IE4==false)) {
	document.write('<link rel="stylesheet" href="includes/winie.css" type="text/css" />');
}
// windows_NN7
else if ((mac==false) && (ncheck=="N") && (vcheck>=5) && (NN7==true)) {
	document.write('<link rel="stylesheet" href="includes/nn.css" type="text/css" />');
}
// windows_Firefox
else if ((mac==false) && (ncheck=="N") && (vcheck>=5) && (Firefox==true)) {
	document.write('<link rel="stylesheet" href="includes/nn.css" type="text/css" />');
}
// windows_Opera7
else if ((mac==false) && (vcheck>=7) && (Opera==true)) {
	document.write('<link rel="stylesheet" href="includes/winie.css" type="text/css" />');
	}
// mac_ie5
if ((mac==true) && (ncheck=="M") && (vcheck>=4)) {
	document.write('<link rel="stylesheet" href="includes/macie.css" type="text/css" />');
}
// mac_Safari
if ((mac==true) && (ncheck=="N") && (Safari==true)) {
	document.write('<link rel="stylesheet" href="includes/nn.css" type="text/css" />');
}
// windows_NN7
else if ((mac==true) && (ncheck=="N") && (vcheck>=5) && (NN7==true)) {
	document.write('<link rel="stylesheet" href="includes/nn.css" type="text/css" />');
}