function PopupCenter(pageURL, title, w, h) 
{
	var left = (screen.width/2)-(w/2);
	var top = 10;
	var targetWin = window.open (pageURL, 'catalogwindow', 'toolbar=yes, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=no, copyhistory=no, width='+w+', height='+h+', top='+top+', left='+left);
}