Retrieves the time stored in a Date object.
The getTime method returns an integer value representing the number of milliseconds between midnight, January 1, 1970 and the time stored in the Date object. When doing multiple date and time calculations, it is frequently useful to define variables equal to the number of milliseconds in a day, hour, or minute. For example:
varMinuteMilli = 1000 * 60
varHourMilli = varMinuteMilli * 60
varDayMilli = varHourMilli * 24