version=parseInt(navigator.appVersion);

	if (navigator.appVersion.indexOf('6.')>-1)
	{	version=6;
	}

	browser='OTHER';

	if (navigator.appName=='Netscape')
	{	browser='NS'+version;
	}
	
	if (navigator.appName=='Microsoft Internet Explorer')
	{	browser='MSIE'+version; 
	}
	
	if (navigator.appVersion.indexOf('MSIE 3')>0)
	{	browser='MSIE3';
	}
	
	if ( (browser=='MSIE3') || (browser=='NS3') || (browser=='NS4') )
	{ 
		var     intWidth = 400;
		var    intHeight = 250;

		var      intTop = parseInt( ( screen.height - intHeight ) / 2 );
		var     intLeft = parseInt( ( screen.width - intWidth  ) / 2 );

		var strPosition = "WIDTH="+intWidth+",HEIGHT="+intHeight+",LEFT="+intLeft+",TOP="+intTop;

		var winNew;
		winNew = window.open('http://www.cr.nps.gov/archeology/popup.htm','popup', strPosition);
		winNew.focus();
	}