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 article assumes a general understanding of HTML and Java Script.
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.
Have a look at the demo to see how it works, and compare the result of clicking the reset button and the button with the custom on Click handler that we have just coded. As the above demo illustrates, the two buttons function similarly, for this particular form, because none of the values of the elements in this form are set on page load.