function openPhotoWindow(gallery, photo) {
	var width = 660;
	var height = 500;
	var url = 'gallerie/EasyGallery.php?ordner=./' + gallery +'&bild=' + photo + '&one=set&single=1';
    var screenX = (screen.width - width) / 2;
    var screenY = (screen.height - height) / 2;
	var photoWindow = window.open(url,
				'photoWindow',
				'width=' + width + ',' +
				'height=' + height + ',' +
				'screenX=' + screenX + ',' +
				'screenY=' + screenY + ',' +
				'resizable=no,location=no,toolbar=no,menubar=no,directories=no,status=no');
	if (window.focus) {
		photoWindow.focus();
	}
}