function popupWindow(filename) {
	var w = 1016;
	var h = 691;
	
	var x = (screen.width - 1016) / 2;
  	var y = (screen.height - 691) / 2;
	
	var windowprops = 'width=' + w + ',height=' + h + ',top=' + y + ',left=' + x + ',toolbar=no,location=no,directories=no,status=no,scrollbars=no,menubar=no,resizable=false';
	var windowname = 'controlPanel';
	var popup = window.open(filename, windowname, windowprops);
	popup.focus();
}