JavaScript Introduction

Requirements:

Before continuing to JavaScript, you have to know the basic understanding of HTML/XHTML.

What is JavaScript? 

JavaScript is a scripting language. It is a scripting language and it is a lightweight programming language. JavaScript can also be embedded directly into HTML pages which is awesome! Pretty much everyone can use JavaScript without purchasing a license.

What the difference between Java and JavaScript? Are they the same?

I have come across a lot of situation of people where they think that Java and JavaScript is the same. NO! they are not the same. There is a difference. Java is developed by Sun Microsystems which is a way powerful and much more complex programming language then JavaScript.

What Can JavaScript do?

It does the following things:

• JavaScript can put dynamic text into an HTML page
• JavaScript can react to events
• JavaScript can read and write HTML elements
• JavaScript can be used to validate data
• JavaScript can be used to detect the visitor's browser
• JavaScript can be used to create cookies

- w3schools.com

Example:

When starting Javascript, you will to include this before and after the code:

<script type="text/javascript"> write your code here </script>. This tells the computer that the javascript code starts from here "<script type="text/javascript">" and ends here "</script>".

So now try this:

<script type="text/javascript"><!--
document.write("Hello World!")
//--></script>

Where to download JavaScript?

You can download JavaScript Editor at http://www.yaldex.com/Ready/freejse.zip for your practise.

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