JavaScript : Form Validation Client side form validation usually done with javascript . For the majority of your users, JavaScript form validation will save a lot of time up front.
JavaScript Form Validation : quick and easy! Add validations quickly to your form using this simple, easy to use, free form validation script.
BenjaminKeen.com - JS Validation This script lets you add javascript validation to your forms quickly and with very little effort. The script checks the values that a user has entered into
Validatious 2.0 - Easy form validation with unobtrusive JavaScript Several settings allow you to control how and when Validatious does validation , how it displays errors and more. If configuring isn't enough, callbacks and