var isNS4 = ((navigator.appName == "Netscape") && (navigator.userAgent.indexOf("Gecko") == -1));
var isNS6 = ((navigator.appName == "Netscape") && (navigator.userAgent.indexOf("Gecko") != -1));
var isOpera = navigator.userAgent.indexOf("Opera") != -1; 
var isFireFox = navigator.vendor == "Firefox";
var isIE = ((navigator.userAgent.indexOf("MSIE") != -1) && (!isOpera));

{
	if (isNS4)
	{ 
		document.write('<link rel="stylesheet" type="text/css" href="mtcGENNS4.css">');
	}
	if (isNS6)
	{
		document.write('<link rel="stylesheet" type="text/css" href="mtcGENNS6.css">');
	}
	if (isOpera)
	{
		document.write('<link rel="stylesheet" type="text/css" href="mtcGENOP.css">');
	}
	if (isFireFox)
	{
		document.write('<link rel="stylesheet" type="text/css" href="mtcGENFF.css">');
	}
	if (isIE)
	{
		document.write('<link rel="stylesheet" type="text/css" href="mtcGENIE6.css">');
	}
}