📄 5-4.htm
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>日期和时间函数</title>
</head>
<body>
<h1 align="center">日期和时间函数</h1>
<script language="VBScript">
<!--
document.write "当前日期时间：Now() = "&Now()&"<br>"
document.write "系统当前日期：Date() = "&Date()&"<br>"
document.write "系统当前时间：Time() = "&Time()&"<br>"
document.write "<br>"
//以系统当前日期为操作日期
document.write "系统当前年：Year(Date()) = "&Year(Date())&"<br>"
document.write "系统当前月：Month(Date()) = "&Month(Date())&"<br>"
document.write "系统当前日：Day(Date()) = "&Day(Date())&"<br>"
document.write "<br>"
//周日为一周的第一天，取到得是1，周一取到的是2，依次类推，周六取到的是7
//WeekDay(Date()) =WeekDay(Date(),1) ，即周日为一周的第一天
document.write "系统当前周：WeekDay(Date()) = "&WeekDay(Date())&"<br>"
//WeekDay(Date(),2) 代表周一为一周的第一天
document.write "系统当前周：WeekDay(Date(),2) = "&WeekDay(Date(),2)&"<br>"
//WeekDay(Date(),3) 代表周二为一周的第一天
document.write "系统当前周：WeekDay(Date(),3) = "&WeekDay(Date(),3)&"<br>"
document.write "<br>"
//DateAdd函数在加时，第二个参数为正数，减时，第二个参数为负数
//当前日期加一年
document.write "加年的计算：DateAdd(""YYYY"",1,Date()) = "&DateAdd("YYYY",1,Date())&"<br>"
//当前日期减一年
document.write "减年的计算：DateAdd(""YYYY"",-1,Date()) = "&DateAdd("YYYY",-1,Date())&"<br>"
//当前日期加俩月
document.write "加月的计算：DateAdd(""M"",1,Date()) = "&DateAdd("M",2,Date())&"<br>"
//当彰日期减俩月
document.write "减月的计算：DateAdd(""M"",1,Date()) = "&DateAdd("M",-2,Date())&"<br>"
//当前日期加三日
document.write "加日的计算：DateAdd(""D"",1,Date()) = "&DateAdd("D",3,Date())&"<br>"
//当前日期减三日
document.write "减日的计算：DateAdd(""D"",1,Date()) = "&DateAdd("D",-3,Date())&"<br>"
document.write "<br>"
//第一个日期小于第二个日期，得到的是正数，反之得到的是负数
//2007-10-01与当前日期差几年，即 Year(Date())-2007
document.write "年的差异计算：DateDiff(""YYYY"",""2007-10-01"",date()) = "&DateDiff("YYYY","2007-10-01",date())&"<br>"
//2008-10-01与当前日期差几月，即Month(Date())+(Year(Date())-2008)*12+(12-10)
document.write "月的差异计算：DateDiff(""M"",""2008-10-01"",date()) = "&DateDiff("M","2008-10-01",date())&"<br>"
//2007-10-01与当前日期相差多少天
document.write "日的差异计算：DateDiff(""D"",""2007-10-01"",date()) = "&DateDiff("D","2007-10-01",date())&"<br>"
-->
</script>
</body>
</html>
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