Task 2

Task 2

You need to figure out how to make the form interactive. You have decided on this initial idea, presented as pseudocode in your Criterion C document:

Code this prototype. Here is a suggested video solution if required.

*note we are considering this a proptotype because it will give the user the look and feel of the form in action, but it does not yet deal with the file handling.

Task B

Data Validation

Data validation is when data entered into a system is checked for validity. The common checks are:

• presence check - is data present? You have already coded this data validation check in Task A!
• format check - does the data match a required format eg an email address needs 1 @ and at least one . (but not as the final character!)
• length check - is the data of the required length? eg employee id numbers may be exactly 5 characters long
• type check - is the data being entered of the correct type? eg you cannot enter the text character "d" into the age field of a form!

Mobile numbers in this country always start with 0 (format check) and are always exactly 9 characters long (length check).

Adapt your solution to display an appropriate error message if an invalid mobile number is entered.

Task C

Data Validation

A range check is necessary on the age field.

Only people who are 16 or older are allowed in the cafe.

Can you figure out how to test if a new member is less than 16 years old and display a warning message if this is true?

This task is optional...

... but a good test of your problem-solving skills!