In this project you will create an application that tests whether all fields within a web form have been

completed. In creating this application, you will take advantage of the fact that empty text strings are falsy and

in a conditional operator will be treated as having the Boolean value false and non$-$empty strings are treated

as truthy with a Boolean value of true. If any of the form fields is left empty, the application will display the

alert box shown in Figure $2-31$ when the Submit button is clicked, otherwise an alert box with the message

$$Thank you!$$ is displayed.