Q25. 다음은 숫자를 입력받아 요일을 판별하는 프로그램이다. 밑줄 친 부분을 채우시오. (200점)

<script>
    var day = 2;
    var day_name;
    switch (_________) {
        case 1:
            day_name = "일요일";
            break;
        case 2:
            day_name = "월요일";
            break;
        case 3:
            day_name = "화요일";
            break;
        case 4:
            day_name = "수요일";
            break;
        case 5:
            day_name = "목요일";
            break;
        case 6:
            day_name = "금요일";
            break;
        case 7:
            day_name = "토요일";
            break;
        _____________:
            day_name = "입력 오류";
    }
    document.write(_________ + "입니다.");
</script>

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