HTML Form Validation
Form Validation
Learn how to do form validation with JavaScript or CGI and the pros and cons of each method. Validating forms is a useful tool in Web development.
How Do You Protect HTML Forms from Spam - CAPTCHAs and Other Methods
Spam is ubiquitous on the Web, and if you put up an email address or HTML form, within a few days someone will hit it with a robot and start sending you spam. How do you protect your HTML forms from spammers? There are lots of different ways of protecting your forms. Find out what others use and share your own successes.
HTML5 Form Validation
There are several new attributes in HTML5 that you can use to tell browsers about how your web forms should be validated. This article explains how to use the new HTML5 attributes in your forms to allow browsers to validate the entries.
Free Form Validation Class - JavaScript @ About.com
In 8 weeks learn all you need to know to validate your HTML forms. From the About.com Guide to JavaScript.