It is possible to see if a check box has been checked or not in Java Script. A check box has a checked property, which returns either a 0 for not checked and a 1 for checked.You can also set the property to 0 or 1 to programmatically control the check box.Form validation is the process of checking that a form has been filled in correctly before it is processed.
There are two main methods for validating forms: (usually done using Java Script).
Server-side validation is more secure but often more tricky to code, whereas client-side (Java Script) validation is easier to do and quicker too (the browser doesn't have to connect to the server to validate the form, so the user finds out instantly if they've missed out that required field! In this tutorial we'll build a simple form with client-side Java Script validation.
Server-side validation incorporates code validation into a form handler. NET application on the server that provides the functionality that your form needs for processing after a customer has submitted it.
Because the code is stored on the server, server-side validation requires a roundtrip to the server.
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.