if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4))
{
	 document.write('<link rel=stylesheet type="text/css" href="ie.css">')
}
else if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 4))
{
	document.write('<link rel=stylesheet type="text/css" href="ns.css">')
}

function isVersion4()
{
	if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4))
	{
		return 1;
	}
	else if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 4))
	{
		return 1;
	}
	else
	{
		return 0;
	}
}