var appName = navigator.appName.toLowerCase();

var appVer = navigator.appVersion.toLowerCase();

var indexN = appVer.indexOf("nt");

var indexNver = indexN + 3;

var ntVer = appVer.substring(indexNver);

var ntVerNoFloat = parseFloat(ntVer);



if (appName.indexOf("microsoft") > -1) {


if (ntVerNoFloat >= 6){
		
		document.write('<link rel="stylesheet" href="ient6.css" type="text/css">');
	}
	else {	
		
		document.write('<link rel="stylesheet" href="ient5.css" type="text/css">');
	}

}
else {
	
	document.write('<link rel="stylesheet" href="other.css" type="text/css">');
}