10 useful plug-in to enhance your HTML form validation

According to Wikipedia :

A webform on a web page allows a user to enter data that is sent to a server for processing. Webforms resemble paper forms because internet users fill out the forms using checkboxes, radio buttons, or text fields.

Today we listed 10 useful plug-in to enhance your HTML form validation. Some of them add more capabilities that able to increase usability and user friendliness to a website. We obviously cannot cover all the best from the web, but we have tried to cover as much as possible.

1. 
   

   Input field validation with Prototype :

   
   robust javascript validation library that was simple to implement and didn't require me do any extra work other than creating the form. The basic method is to attach to the form's onsubmit event, read out all the form elements' classes and perform validation if required. If a field fails validation, reveal field validation advice and prevent the form from submitting.
   
   
2. 
   

   JavaScript form input mask :

   
   form fields use unobtrusive JavaScript to implement "input masks. The characters you can enter into the fields are constrained, and separators are automatically added, but no actual value checking is done.
   
   
3. 
   

   fValidate

   
   fValidate is a javascript-based form validation tool for HTML forms. fValidate is an object-oriented script that is driven by a form's onsubmit event. The main algorithm searches the form's elements collection for validation codes and validates the fields accordingly.
   
   
4. 
   

   Validate.js :

   
   
5. 
   

   Form Validation Script :

   
   
6. 
   

   Ajax Contact form with validation :

   
   
7. 
   

   Form validation with Spry :

   
   
8. 
   

   FormCheck - Mootools plugin :

   
   Show errors on tips over the field, Display only one tip at once,Tips don't flash on submit if errors remain ,Ability to close tips.
   
   
9. 
   

   Live Validation :

   Live Validation is a small open source JavaScript library for making client-side validation quick, easy, and powerful. It comprises of two main parts. Firstly, it provides developers with a rich set of core validation methods.
   
10. 
    

    jQuery Validation :

    Default submitHandler is set to display an alert into of submitting the form.