function popupWin(width, height, fileName) {
	var tTop = (screen.availHeight - height)/2;
	var lLeft = (screen.availWidth - width)/2;
	
	window.open(fileName, "_blank", "height=" + height + ", width=" + width + ", location=no, menubar=no, toolbar=no, left=" + lLeft + ", top=" + tTop);
}