function popupWindow(url, width, height) {
	var wdiv2 = (screen.width - width) / 2;
	var hdiv2 = (screen.height - height) / 2;

	var winproperties = 'height=' + height + ',width=' + width + ',top=' + hdiv2 + ',left=' + wdiv2 + 'resizable=0,scrollbars=yes'

	window.open(url, 'popupWindow', winproperties);
}