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Adobe ColdFusion 8 Web Application Construction Kit, Volume 1: Getting Started by Charlie Arehart, Raymond Camden, Ben Forta

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Comparing Server-Side and Client-Side Validation

Server-side validation involves checking for required fields or invalid values after a form has been submitted. The script on the server first validates the form and then continues processing only if all validation requirements are met. Typically, an error message is sent back to the user’s browser if validation fails; the user then goes back to the page, makes the corrections, and resubmits the form. Of course, the form submission must be validated again upon resubmission, and the process must be repeated if the validation fails again.

Client-side scripting lets the developer embed instructions to the browser within the HTML code. Because HTML itself provides no mechanism for doing this, developers ...

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