Hidden Fields in Forms
As you learned back in Hour 5, “Creating HTML Forms,” you can use hidden form fields in your forms. Each of these fields contains a name and value that is passed to the CGI script along with the other visible form fields. You can use these hidden form fields to save the state of a transaction from one form to the next, as you saw in the previous lesson.
Let’s say you’re building a Web page that allows a user to register, and you want to ask the user additional questions based on the information he provides in the registration form. If the user responds that he has a TV in his home, you may want to ask how much TV he watches in a week. If he has a dog, you could ask what his favorite brand of dog food is.
In order to store ...
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