For an alternative approach to client-side form validation, without Java Script, check out our new article on HTML5 Form Validation which is available now in most modern browsers.When form input is important, it should always be verified using a secure server-side script.

Validating form input with Java Script is easy to do and can save a lot of unnecessary calls to the server as all processing is handled by the web browser.

It can prevent people from leaving fields blank, from entering too little or too much or from using invalid characters.

is an open source component of Wrapp and is licensed under the MIT license.

There are no required external dependencies at all!

Often, email validation code for web applications checks only for the position of @ and period characters, also assuming the @ character will be in the front of period. Did you know you can use a Java Script Regular Expressions method to check email addresses?

Description: A script that closely examines the content of a form box to ensure that the user entered a valid email address.Example: Directions: Simply cut and paste the below code into the section of your page.It contains a form with one box that is checked for "email validity".In other words if the first condition fails, the second condition will not be tested and so forth.Only when all conditions have been satisfied do we reach the command, in which case the form will be submitted.provides a declarative way of validating javascript objects.