Some times we need the functionality such as
HTML Data Form validation. Then in
web development we have two kind of methods to valid the entire data form.
One is to validate it on server side, mean with PHP, ASP, or JSP. It is a
fact that when we use server side scripting language our web server need to work
much more. And experience says that we need to use client side scripting
instead of server side for validations
like email address validations, some text boxes are empty or not and much more. When we use
JavaScript to validate some
data on client side this will make our browsing fast and suppose instead of
client side we use server side then the performance of this validation will be
slow.
Client side scripts are executes or validate on the client's computer that's why
its performance is fast and the server side scripts execute on web server where
site is hosted, for this execution entire the internet will be use for the
validations.
Here our JavaScript Tutorial will express all of us that the JavaScript is a
very easy way to add all sorts of dynamic elements to our
sites. Unless we've some programming experience, JavaScript will be quite
a new concept at the start — it's fairly different to
HTML. In this JavaScript Tutorial
we'll be laying some groundwork on the language, and writing our first script.
JavaScript is a client-side language, which means all the action occurs on the
client's (reader's) side of things. This means that no trips to the server are required
for JavaScript to kick into operation, which would slow down execution process enormously.
JavaScript operations are usually performed instantaneously. In fact, JavaScript is often
used to perform operations that would otherwise encumber the server, like form input
validation. This distribution of work to the relatively quick client-side service speeds
up the process.
JavaScript is integrated into the browsing environment, which means JavaScript can get
information about the browser and
HTML page, and modify this information, thus changing how
things are presented on your screen. This access to information gives JavaScript great power
to modify the browsing experience. JavaScript can also react to events, such as when the user clicks
their mouse, or points to a certain page element. This is also a very powerful ability
of JavaScript.
Most importantly, JavaScript isn't overly tough to learn and use. It's a little technical,
of course, but after just go through a few pages of this JavaScript Tutorial you'll have some useful scripts in your pages, and will
have the knowledge necessary to modify and use the countless free JavaScript available across this
JavaScript Tutorial.
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