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Using External JavaScript Files

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Using External JavaScript Files

Besides, enclosing the common JavaScript routines in external
files keeps your web pages uncluttered and search engine spiders
and crawlers are able to reach the important content easily. They
don't have to shuffle through tens of lines of scripts.

In the first edition [that appeared in my newsletter - BYTESWORTH
REACHOUT] of my article I had omitted the process of creating the
external JavaScript files, but when one of my readers asked me
how to do it, I had to re-write the article.

It's very simple. Use any text editor of your liking (if you
hand-code your HTML, you can use the same editor that you use for
your HTML editing). Write the required code, and save the file
with .js (dot js) extension.

I'm going to give you a small example.

Suppose your JavaScript file is "myjfuncs.js".

and it has a function to return the bigger number of the two
supplied as parameters (you can simply start with the function,
no need to write or some other stuff):

function bigger(num1, num2)
{
var holdbig;
if (num1num2)
{
holdbig=num1;
}
else
{
holdbig=num1;
}
return holdbig;
}

In a similar manner, we can have

function smaller(num1, num2)
{

}

When we want to use this precious file full of JavaScript
functions, we use this line:

So when we use one of its functions in a JavaScript:

var n1=90;
var n2=7;
alert ("The bigger number is: " + bigger(n1, n2));

In this way, we can use all the complex functions contained in
the myjfuncs.js file.

About the Author

Amrit Hallan is a freelance web designer. For all web site
development and web promotion needs, you can get in touch with
him at amrit@bytesworth.com or http://www.bytesworth.com. For
more such articles, visit http://www.bytesworth.com/articles You
can subscribe to his newsletter [BYTESWORTH REACHOUT] on Web
Designing Tips & Tricks by sending a blank email at
bytesworth-subscribe@topica.com

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