var brwsr;
if (navigator.appName == 'Microsoft Internet Explorer')
{
	if (parseInt(navigator.appVersion) >= 3)
		brwsr = 'IE';
	else
		brwsr = null;
}
else if (navigator.appName == 'Netscape')
{
	if (parseInt(navigator.appVersion) >= 5)
		brwsr = 'NS6';
	else if (parseInt(navigator.appVersion) >= 4)
		brwsr = 'NS4';
	else
		brwsr = null;
}

function br()
{
	if (brwsr == 'IE')
		document.write("<br>");
	else if (brwsr == 'NS4')
		document.write("<br>");
	else if (brwsr == 'NS6')
		document.write("<br>");
}
br();