var popupWin;

function showSizedPopup(url, width, height) {
	if (popupWin && !popupWin.closed) {
		popupWin.close();
	}
	popupWin = window.open(url, "", "width=" + width + ",height=" + height + ",toolbar=no,menubar=no,status=no");
}

function showPaypalPrimaryEmailPopup() {
	showSizedPopup('paypal-primary-email.php', 450, 350);
}

function showAverageLetterFreqPopup() {
	showSizedPopup('average-letter-freq.php', 450, 200);
}

function showSmartScorePopup(productNumber) {
	showSizedPopup('smart-score.php?pn=' + productNumber, 450, 250);
}

function showScreenPopup(url) {
	showSizedPopup(url, 614, 500);
}