function zoom(img_id, lng) {
	var height ="430";var width ="680";
	var str = "height=" + height + ",innerHeight=" + height;
	str += ",width=" + width + ",innerWidth=" + width;
	if (window.screen) {
		var ah = screen.availHeight - 30;var aw = screen.availWidth - 10;
		var xc = (aw - width) / 2;var yc = (ah - height) / 2;
		str += ",left=" + xc + ",screenX=" + xc;
		str += ",top=" + yc + ",screenY=" + yc;
	}
	window.open('zoom.php?img_id='+img_id+"&lng="+lng, 'zoom_img', str);
}