why you used Java Script? Can it use for both client side
and server side validation purpose?

Answer Posted / arul

Javascript is a client side scripting, which runs in the
browser. Even AJAX runs in the browser and is also a client
side one, which actually is nothing but Javascript. In AJAX
javascript is used to communicate with server side
components or post values to a JSP / ASP or any web page or
any services which can be referred by URL.

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