Java Script is one of the most pervasive
languages found on the internet and World
Java Script is useful in making web pages
The pages can be made to react to the
actions of the users in the form of special
effects, both visual and otherwise.
Java Script began as a joint effort between
Netscape Communications Corporation and
Sun Microsystems beginning in the year
Java Script is an object-based, client-side
scripting language that can be used to make
web pages more dynamic.
Java Script can make use of items called
The use of objects is different in Java Script
because, here the objects are not class based.
There is no distinction between classes and
Java Script is run on the client systems.
Here, Java Script is run on the web browser
rather than on the web server which is
serving a page from the website.
A Scripting Language is very different from
the conventional programming languages.
One of the main differences is that a scripting
language does not require a compiler to run
In a scripting language the code is
interpreted as it is being loaded. This saves
the time of the client.
Script Tags are used to trigger the beginning
and ending of a scripting language in a HTML
In the most basic forms, these scripting tags
are seen as just any other HTML tags.
External Script file is a text file that
contains Java Script code.
This is external script is used to run the code
on a multiple pages.
This is a time saving act for the client.
A Variable is used to hold value. A variable’s
actual value can be altered at any point in
Variables are used when the coder does not
know the kind of values that will be used in
Variables can save time in writing and
updating the scripts.
Variables include data types such as null
value, number values, Boolean values, string
A Function can be defined as smaller script
within a larger script.
Functions are particularly useful for
performing small tasks or a series of tasks.
Functions are useful in dividing the whole
script into smaller parts so that each task is
This makes it easier to run the whole script
and debug it quickly and easily.
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