public static String calDay(int d){
		String sDay;
		switch (d){
		case 1: case 2: case 3: case 4: case 5: case 6: case 7:
		case 8: case 9:
			sDay = "0" + Integer.toString(d);
			break;
		default:
			sDay = Integer.toString(d);
			break;
		}
		return sDay;
	}