function openCenterWindow (url, name, width, height, showScroll) {
	var winLeft = screen.availWidth / 2 - (width / 2);
	var winTop = screen.availHeight / 2 - (height / 2);

	window.open(url, name, "width=" + width + ",height=" + height + ",left=" + winLeft + ",top=" + winTop + ",menubar=no,scrollbars=" + ((showScroll) ? "yes" : "no") + ",status=no,resizable=" + ((showScroll) ? "yes" : "no") + ",toolbar=no,directories=no,location=no,dependent=yes,personalbar=no");
}
/////////////////////////////////////////////////////////////////////////////
function openCenterScreenParams (url, name, width, height, params) {
	if(params.length > 0) {
		params = "," + params;
	}
	
	var winLeft = screen.availWidth / 2 - (width / 2);
	var winTop = screen.availHeight / 2 - (height / 2);

	window.open(url, name, "width=" + width + ",height=" + height + ",left=" + winLeft + ",top=" + winTop + params);
}