function PopupOpen(psURL) 
{
	var nHeight = 500;
	var nWidth = 600;
	var nTop = (screen.height - nHeight) / 2;
	var nLeft =(screen.width - nWidth) / 2;
	window.open(psURL, 'popup',"location=no, scrollbars=yes, toolbar=no, resizable = no, top=" + nTop + ",left=" + nLeft + ",width=" + nWidth + ",height=" + nHeight);
}