Tài liệu Working with Dates in Flash docx

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Working with Dates in Flash

It's useful in Flash to be able to access date information—to display the date, make a

movie do specific things on certain dates, create countdown timers, or display the day of

the week for a particular date in history, to name just a few examples.

To use dates in Flash, you create an instance of the Date class by using the following

syntax:

var myDate:Date = new Date(year, month, date);

This syntax creates a new Date object named myDate. The parameters in parentheses

associate the Date object with a specific date. For example:

var myDate:Date = new Date(66, 6, 27);

This example creates a Date object associated with July 27, 1966. The first parameter

represents the year, the second represents the month, and the third represents the date.

You may wonder why July, which we consider the seventh month in the year, is actually

defined as the sixth month in the script above. In ActionScript, both months and days of

the week are referenced by numbers, beginning with 0; therefore, January is the "zero"

month, February is the first month, March is the second month, and so on—up to

December, which is the eleventh month. Likewise, days of the week begin with Sunday

as the "zero" day, Monday the first day, and so on. The following exercise demonstrates

the usefulness of this numbering system.