function writeDateInfo() {
    var day = "";
    var month = "";
    var ampm = "";
    var ampmhour = "";
    var myweekday = "";
    var year = "";
    mydate = new Date();
    var hours = mydate.getHours();
    if (hours >= 5 && hours < 7)
        ampm = "清晨";
    else if (hours >= 7 && hours < 9)
        ampm = "早上";
    else if (hours >= 9 && hours < 12)
        ampm = "上午";
    else if (hours >= 12 && hours < 14)
        ampm = "中午";
    else if (hours >= 14 && hours < 18)
        ampm = "下午";
    else if (hours >= 18 && hours < 19)
        ampm = "傍晚";
    else if (hours >= 19 && hours < 24)
        ampm = "晚上";
    else
        ampm = "凌晨";
    hours = ((hours > 12) ? hours - 12 : hours);
    var minutes = ((mydate.getMinutes() < 10) ? ":0" : ":") + mydate.getMinutes();
    var seconds = ((mydate.getSeconds() < 10) ? ":0" : ":") + mydate.getSeconds();

    var TimeValue = (ampm+" " + hours + minutes + seconds + ""); 
    
    myweekday = mydate.getDay();
    mymonth = mydate.getMonth() + 1;
    myday = mydate.getDate();
    myyear = mydate.getYear();
    year = (myyear > 200) ? myyear : 1900 + myyear; if (myweekday == 0) weekday = " 星期日";
    else if (myweekday == 1) weekday = " 星期一";
    else if (myweekday == 2) weekday = " 星期二";
    else if (myweekday == 3) weekday = " 星期三";
    else if (myweekday == 4) weekday = " 星期四";
    else if (myweekday == 5) weekday = " 星期五";
    else if (myweekday == 6) weekday = " 星期六";
    document.getElementById("timevalue").innerText = "     " + year + "年" + mymonth + "月" + myday + "日" + weekday + " " + TimeValue;
    setTimeout(writeDateInfo, 1000);
}