一个很实用的Date js

<script language="JavaScript">
function say_hello() {
    var Today, thisYear, thisMonth, thisDay, thisHour, thisMinute, thisSecond, thisWeekday;
    var WeekdayArray, strDate, strTime, strHello;
    Today = new Date();
    thisYear = Today.getYear();
    thisMonth = Today.getMonth() + 1;
    thisDay = Today.getDate();
    thisHour = Today.getHours();
    thisMinute = Today.getMinutes();
    thisSecond = Today.getSeconds();

    WeekdayArray = new Array ("日", "一", "二", "三", "四", "五", "六");
   thisWeekday = WeekdayArray[Today.getDay()];
 
    strDate = thisYear + "年";
   strDate += thisMonth + "月";
    if (thisDay < 10) {
        strDate += " ";
    }
   strDate += thisDay + "日";

    strDate += " 星期" + thisWeekday;
   
    strTime = thisHour + "时";
    if (thisMinute < 10) {
        strTime += " ";
    }      
   strTime += thisMinute + "分";
    if (thisSecond < 10) {
        strTime += " ";
    }
   strTime += thisSecond + "秒";
   
    if (thisHour < 6) {          
        strHello = "凌晨好";
    }
    else if (thisHour < 9) {
        strHello = "早上好";
    }
    else if (thisHour < 12) {
        strHello = "上午好";
    }
    else if (thisHour < 14) {
        strHello = "中午好";
    }
    else if (thisHour < 17) {
       strHello = "下午好";
    }
    else if (thisHour < 19) {
        strHello = "傍晚好";
    }
    else if (thisHour < 22) {
        strHello = "晚上好";
    }
    else {
       strHello = "夜里好";
    }
   
  
 
    window.setTimeout("say_hello();", 1000);
      document.getElementById("user").value=strDate+"  "+strTime+"  " +strHello;
}

</script>
<html>
<head>
</head>
<body   onload="say_hello()">
<input type="text"  id="user"  name="hello"   value=""   size="100"/>
</body>
</html>