Section 15.4. Chapter 15 Questions

15.4. Chapter 15 Questions

Question 15-1.

What are the pros and cons of using JavaScript to validate form input?

Question 15-2.

Write the JavaScript code to display the warning "The username field must be at least six characters."

Question 15-3.

Write a regular expression to validate a U.S. zip code, including the optional "zip plus four" style.

Question 15-4.

Write the PHP code to test a variable called $zipcode using the regex expression from Question 15-3.

See the Appendix for the answers to these questions.