JavaScript UTC()方法

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出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-03-04 浏览: 330 ::

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Definition and Usage
定义与用法

The UTC() method takes a date and returns the number of milliseconds since midnight of January 1, 1970 according to universal time.
UTC()方法可以得到一个日期并根据国际时间返回相差1970年1月1号有多少毫秒。

Syntax
语法

Date.UTC(year,month,day,hours,minutes,seconds,ms)

Parameter 参数	Description 描述
year	Required. A four digit number representing the year 必选。代表年份的四位数字
month	Required. An integer between 0 and 11 representing the month 必选。代表月份的整数，范围是0到11
day	Required. An integer between 1 and 31 representing the date 必选。代表日期的整数，范围是1到31
hours	Optional. An integer between 0 and 23 representing the hour 可选。代表小时的整数，范围是0到23
minutes	Optional. An integer between 0 and 59 representing the minutes 可选。代表分钟的整数，范围 0到59
seconds	Optional. An integer between 0 and 59 representing the seconds 可选。代表秒的整数，范围 0 到 59
ms	Optional. An integer between 0 and 999 representing the milliseconds 可选。代表毫秒的整数，范围 0到999

Example
举例

In this example we will get how many milliseconds there are from 1970/01/01 to 2005/07/08 according to universal time:
在举例中我们将根据国际时间得到1970/01/01到2005/07/08所用掉的毫秒数：

<script type="text/javascript">

var d = Date.UTC(2005,7,8)
document.write(d)

</script>

The output of the code above will be:
输出结果为：

1123459200000

Example 2
举例 2

Now we will convert the output from the example above into years:
现在我们将上面的举例转换成输出年份差距：

<script type="text/javascript">

var minutes = 1000 * 60
var hours = minutes * 60
var days = hours * 24
var years = days * 365
var t = Date.UTC(2005,7,8)
var y = t/years
document.write("It's been: " + y + " years from 1970/01/01")
document.write(" to 2005/07/08!")

</script>

The output of the code above will be:
结果为：

It's been: 35.62465753424657 years from 1970/01/01 to 2005/07/08!

Try-It-Yourself Demos
尝试与演示

UTC()
Use UTC() to print the milliseconds from 1970/01/01 to a specified date (according to universal time).
使用UTC()根据国际时间输出的1970/01/01到指定日期所需要的毫秒数。