var vcheck = navigator.appVersion.charAt(0);
var ncheck = navigator.appName.charAt(0);
var IE5 = navigator.userAgent.indexOf("MSIE 5")>=0;
var NN = navigator.userAgent.indexOf("Netscape")>=0;
var NN7 = navigator.userAgent.indexOf("Netscape/7")>=0;
var Firefox = navigator.userAgent.indexOf("Firefox")>=0;
var Mozilla = navigator.userAgent.indexOf("Mozilla")>=0;
var Safari = navigator.userAgent.indexOf("Safari")>=0;
var win = navigator.userAgent.indexOf("Win")>=0;
var mac = navigator.userAgent.indexOf("Mac")>=0;

//css
var nf_style = "<link href='css/index.css' rel='stylesheet' type='text/css' media='screen,print'>";

//windows
if (win==true) {
	//IE
	if ((ncheck=="M") && (vcheck>=4) && (IE5==false)) { document.write(nf_style); }
	else if ((ncheck=="N") && (vcheck>=5)) {
		//NN7
		if ((NN==true) && (NN7==true)) { document.write(nf_style); }
		//Mozilla
		else if ((NN==false) && (Mozilla==true) && (Firefox==false)) { document.write(nf_style); }
		//Firefox
		else if ((NN==false) && (Mozilla==true) && (Firefox==true)) { document.write(nf_style); }
		else {}
	}
	//Opera
	else if ((ncheck=="O") && (vcheck>=7)) { document.write(nf_style); }
	else {}
}
//macintosh
if (mac==true) {
	//IE
	if ((ncheck=="M") && (vcheck>=5) && (Safari==false)) { document.write(nf_style); }
	else if ((ncheck=="N") && (vcheck>=5)) {
		//NN7
		if ((NN==true) && (NN7==true)) { document.write(nf_style); }
		//Mozilla
		else if ((NN==false) && (Mozilla==true) && (Firefox==false) && (Safari==false)) { document.write(nf_style); }
		//Firefox
		else if ((NN==false) && (Mozilla==true) && (Firefox==true) && (Safari==false)) { document.write(nf_style); }
		//Safari
		else if ((NN==false) && (Safari==true)) { document.write(nf_style); }
		else {}
	}
	//Opera
	else if ((ncheck=="O") && (vcheck>=8)) { document.write(nf_style); }
	else {}
}

function popupMenu(name) {
	if ( document.all ) { var txtObj = document.all(name); txtObj.style.display = ''; }
	else if ( document.layers ) { var txtObj = document.layers[name]; txtObj.style.display = ''; }
	else if ( document.implementation ) { var txtObj = document.getElementById(name); txtObj.style.display = ''; }
}
function popoffMenu(name) {
	if ( document.all ) { var txtObj = document.all(name); txtObj.style.display = 'none'; }
	else if (document.layers) { var txtObj = document.layers[name]; txtObj.style.display = 'none'; }
	else if ( document.implementation ) { var txtObj = document.getElementById(name); txtObj.style.display = 'none'; }
}