Here's an example of the above in action: Almost all answers to this questions suggest using Regex to validate emails addresses.I think Regex is only good for a rudimentary validation.All those functions are called from another function.It sets the focus to the input field until the user supplies a valid value.Shows you how to write a script that ensures your form is filled in correctly before it's sent to your server.Great for "required fields" such as email addresses!
The script has a catalog of almost all the common validation types built-in.
The idea is to create a set of “validation descriptors” associated with each element in a form.
This tutorial will show you how to create a Java Script-enabled form that checks whether a user has filled in the form correctly before it's sent to the server. First we'll explain why form validation is a useful thing, and then build up a simple example form, explaining things as we go along.
At the end, there's a little exercise to keep you busy too!