VBScript DateDiff function
DateDiff function returns the time interval between two dates number.
grammar
DateDiff(interval,date1,date2[,firstdayofweek[,firstweekofyear]])
参数 | 描述 |
---|---|
interval | 必需。计算 date1 和 date2 之间的时间间隔的单位。 可采用下面的值:
|
date1,date2 | 必需。日期表达式。在计算中需要使用的两个日期。 |
firstdayofweek | 可选。规定一周的日数,即当周的第几天。 可采用下面的值:
|
firstweekofyear | 可选。规定一年中的第一周。 可采用下面的值:
|
Examples
Example 1
In 2009 the difference between January 31 and January 31, 2010:
<script type="text/vbscript">
fromDate="31-Jan-09 00:00:00"
toDate="31-Jan-10 23:59:00"
document.write(DateDiff("yyyy",fromDate,toDate) & "<br />")
document.write(DateDiff("q",fromDate,toDate) & "<br />")
document.write(DateDiff("m",fromDate,toDate) & "<br />")
document.write(DateDiff("y",fromDate,toDate) & "<br />")
document.write(DateDiff("d",fromDate,toDate) & "<br />")
document.write(DateDiff("w",fromDate,toDate) & "<br />")
document.write(DateDiff("ww",fromDate,toDate) & "<br />")
document.write(DateDiff("h",fromDate,toDate) & "<br />")
document.write(DateDiff("n",fromDate,toDate) & "<br />")
document.write(DateDiff("s",fromDate,toDate) & "<br />")
</script>
fromDate="31-Jan-09 00:00:00"
toDate="31-Jan-10 23:59:00"
document.write(DateDiff("yyyy",fromDate,toDate) & "<br />")
document.write(DateDiff("q",fromDate,toDate) & "<br />")
document.write(DateDiff("m",fromDate,toDate) & "<br />")
document.write(DateDiff("y",fromDate,toDate) & "<br />")
document.write(DateDiff("d",fromDate,toDate) & "<br />")
document.write(DateDiff("w",fromDate,toDate) & "<br />")
document.write(DateDiff("ww",fromDate,toDate) & "<br />")
document.write(DateDiff("h",fromDate,toDate) & "<br />")
document.write(DateDiff("n",fromDate,toDate) & "<br />")
document.write(DateDiff("s",fromDate,toDate) & "<br />")
</script>
Examples of the above output:
1
4
12
365
365
52
53
8783
527039
31622340
4
12
365
365
52
53
8783
527039
31622340
try it"
Example 2
How many weeks (on Monday) between December 31 and December 31, 2012 2009:
<script type="text/vbscript">
fromDate=CDate("2009/12/31")
toDate=CDate("2012/12/31")
document.write(DateDiff("w",fromDate,toDate,vbMonday))
</script>
fromDate=CDate("2009/12/31")
toDate=CDate("2012/12/31")
document.write(DateDiff("w",fromDate,toDate,vbMonday))
</script>
Examples of the above output:
156
try it"
Complete VBScript Reference