function openPopup(pageURL, xSize, ySize) {
	xLocation = (screen.width / 2) - (xSize / 2) + 50;
	yLocation = (screen.height / 2) - (ySize / 2) - 50;

	windowName = "MyNewWindow";
	settings = "toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,width=" + 
		ySize + ",height=" + xSize + ",left=" + xLocation + ",top=" + yLocation;
	MyNewWindow = window.open(pageURL, windowName, settings);
}