if (document.all){
	if(navigator.appVersion.indexOf('Mac') !=-1)
		{document.write('<link rel=stylesheet type="text/css" href="css/macie.css">')}
	else
		{document.write('<link rel=stylesheet type="text/css" href="css/pcie.css">')}
	}

else {
		var pcnet = "css/pcns.css";
		var macnet = "css/macns.css";
		var irixnet = "css/linuxns.css";
		var css;
		if(navigator.appVersion.indexOf('Mac') !=-1)
		{	css = macnet;}
			else if(navigator.appVersion.indexOf('Linux') !=-1 || navigator.appVersion.indexOf('IRIX') !=-1)
			{css = irixnet;}
		else
			{css = pcnet;}
		document.write("<link rel=stylesheet type=\"text/css\" href=\""+css+"\">");
 	}