Definition and Usage
定义与用法

The getDay() method returns a number that represents the day of the week.
getDay()方法可返回星期几。

Syntax
语法

dateObject.getDay()

Tips and Notes
提示与注意点

Note: The value returned by getDay() is a number between 0 and 6. Sunday is 0, Monday is 1 and so on.
注意点：getDay()所返回的值是从0到6的。星期天为0，星期一为1，依次类推

Note: This method is always used in conjunction with a Date object.
注意点：这个方法得和Date对象结合使用

Example
举例

In this example we get the current day (as a number) of the week:
在这个举例中我们将获取当前为星期几（数字的形式）：

<script type="text/javascript">

var d=new Date()
document.write(d.getDay())

</script>

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

Example 2
举例2

Now we will create an array to get our example to write a weekday, and not just a number:
现在我们建立一个数组，然后依据数字来显示出文字的星期几：

<script type="text/javascript">

var d=new Date()

var weekday=new Array(7)
weekday[0]="Sunday"
weekday[1]="Monday"
weekday[2]="Tuesday"
weekday[3]="Wednesday"
weekday[4]="Thursday"
weekday[5]="Friday"
weekday[6]="Saturday"

document.write("Today it is " + weekday[d.getDay()])

</script>

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

Try-It-Yourself Demos
尝试与演示

getDay()
Use getDay() and an array to write a weekday, and not just a number.
使用getDay()和数组来写出星期几而不仅仅是数字

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