function openCPIcalc() {
	w=window.open('','cpicalc','width=150,height=300,location=no,menubar=no,scrollbars=no,status=no,titlebar=no,toolbar=no,resizable=yes');
	if (w == null) {
		return true; //use href
	} else {
		w.location = 'http://data.bls.gov/cgi-bin/cpicalc.pl'; //fix for NN2 on Mac and X11
		if (w.opener == null) w.opener = self; //required for NN2
	}
	return false;
}