You can determine whether a year is a leap year by testing if it is divisible by 4.
However, years that are also divisible by 100 are not leap years, unless they are
also divisible by 400, in which case they are leap years. Write a script that
allows a user to enter a year and then determine whether the year entered is a
leap year. Include a form with a single text box where the user can enter a year.
Display an alert dialog box to the user stating whether the year they entered is a
standard year or a leap year.