Validating a submit request with javascipt

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.However, for some form functions, server-side validation is necessary.For example, if you have a form that populates a drop-down list based on the value of another form field, server-side processing may be needed to pull data from a database and populate the drop-down list.Now we will see how we can validate our entered form data before submitting it to the web server.The following example shows how to validate an entered email address.

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It converts form type constraints into Java Script validation rules.(For more information on how to create form validation using the Front Page form feature, see About creating forms in Front Page 2003.) However, if the form validation provided in Front Page does not suit your needs or the site on which you are working is hosted on a server that does not have Front Page Server Extensions from Microsoft installed, you may need to create custom form validation.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.For this reason, client form validation can be faster than server-side validation.However, client-side validation may not work in all instances.

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