What’s JavaScript?

• JavaScript is the world’s most popular programming language.
• JavaScript is the programming language of the Web.
• JavaScript is easy to learn.
• This tutorial will teach you JavaScript from basic to advanced.

Why Study JavaScript?

JavaScript is one of the 3 languages all web developers must learn:

1. HTML to define the content of web pages

2. CSS to specify the layout of web pages

3. JavaScript to program the behavior of web pages

Welcome to the AdsReg Developer Network(ARDN) beginner’s JavaScript course! In this article we will look at JavaScript from a high level, answering questions such as “What is it?” and “What can you do with it?”, and making sure you are comfortable with JavaScript’s purpose.

Realy waht is this?

JavaScript is a scripting or programming language that allows you to implement complex features on web pages — every time a web page does more than just sit there and display static information for you to look at — displaying timely content updates, interactive maps, animated 2D/3D graphics, scrolling video jukeboxes, etc. — you can bet that JavaScript is probably involved. It is the third layer of the layer cake of standard web technologies, two of which (HTML and CSS) we have covered in much more detail in other parts of the Learning Area.

1. HTML is the markup language that we use to structure and give meaning to our web content, for example defining paragraphs, headings, and data tables, or embedding images and videos in the page.
2. CSS Style is a language of style rules that we use to apply styling to our HTML content, for example setting background colors and fonts, and laying out our content in multiple columns.
3. JavaScript is a scripting language that enables you to create dynamically updating content, control multimedia, animate images, and pretty much everything else. (Okay, not everything, but it is amazing what you can achieve with a few lines of JavaScript code.)

Sample 1:

Sample 2:

Sample 3: Change Image

Sample 4: Change Text Style