Validating input in javascript

First, download the Java Script form validation script here.The zip file contains the javascript file, examples.This was really a lengthy process which used to put a lot of burden on the server.Java Script provides a way to validate form's data on the client's computer before sending it to the web server. First let us see how to do a basic form 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.

The following code shows the implementation of this validate() function.

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.

Note Front Page Server Extensions are a set of programs that provide access to special Front Page features, such as database processing, form processing, hit counters, and other built-in Front Page components that require server-side processing.

You can provide custom validation for your forms in two ways: server-side validation and client-side validation.


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