Exam 6: Enhancing and Validating Forms

Describe how you can use JavaScript to simulate the behavior of the placeholder attribute in older browsers?.

For any fields that require numeric values, you can use JavaScript's built-in ____   function  to determine whether a user actually entered a number.

Which type value for the input element triggers validation in modern browsers?

__________ is the process of checking that information provided by users conforms to rules to ensure that it appropriately answers a form's questions and is provided in a format that the site's back-end programs can work with.

Which attribute toggles off validation of a form when added to the opening <form> tag?

To send the values entered in a form to a web server with JavaScript, you use the __________ method.

In general, modern browsers display validation feedback after the ____ event is triggered by a form.

You use the ____ method on an object to block the action normally associated with an event.

If you were designing a form with a question that asked users if they had ever visited a certain city, would you expect more accurate input using a text input box or a check box? Why?

To check if an option button is selected, you access the value of its ____ property.

Creating a function to validate required fields generally involves retrieving the values of the  required fields and checking if the value of any of them is __________.

Use of the ____ attribute of the form element is not allowed in the strict DTD for XHTML.

The requirements of the form you're validating determine the kind of logic you need to  incorporate into a custom validation program. However, a few types of validation functions  are particularly common. Name two.

What does a function to validate required fields generally need to do?

Describe the three behaviors that make up the placeholder effect in modern browsers, and that you need toreplicate with JavaScript for older browsers.

Why is is usually not necessary to include testing for the number of characters in user input in custom validation functions?

What element property would you use when copying the contents of one text field to another text field?

What is an assistive function? Give an example of a situation in which you might use an assistive function.

Many aspects of the way browsers present browser-based validation feedback are customizable  through the properties and methods of the ____.

You can use the CSS ____ pseudo-classes to change the properties of form elements based on their validity status.