上午好，中午好，下午好，提示语

<script type="text/javascript">
        today = new Date();
        var date;        var hello;         var wel;
        if (hour < 6) hello = '凌晨好'

        else if (hour < 9) hello = '早上好'

        else if (hour < 12) hello = '上午好'

        else if (hour < 14) hello = '中午好'

        else if (hour < 17) hello = '下午好'

        else if (hour < 19) hello = '傍晚好'

        else if (hour < 22) hello = '晚上好'

        else { hello = '夜里好' }

        if (today.getDay() == 0) day = '星期日'

        else if (today.getDay() == 1) day = '星期一'

        else if (today.getDay() == 2) day = '星期二'

        else if (today.getDay() == 3) day = '星期三'

        else if (today.getDay() == 4) day = '星期四'

        else if (today.getDay() == 5) day = '星期五'

        else if (today.getDay() == 6) day = '星期六'

        date = (today.getFullYear()) + '年' + (today.getMonth() + 1) + '月' + today.getDate() + '日';

        document.write(hello);

    </script>
    <script type="text/javascript">

        document.write(date + ' ' + day + ' ');

    </script>