Introduction to JavaScript

Introduction to JavaScript

The introduction to JavaScript explains you the basic of JavaScript web scripting. Following are the few topics covered in this JavaScript document.

• What is JavaScript
• Uses of JavaScript
• Writing JavaScirpt
• Programming Basics
• Variables
• Functions
• JavaScript Objects
• Objects
• Properties
• Methods
• Document and Window Objects
• Write to a Document
• Open a Window
• JavaScript Events
• Events and Objects
• Image Rollovers

JavaScript Origins

JavaScript was released by Netscape and Sun Microsystems in 1995. However, JavaScript is not the same thing as Java.

What is JavaScript

• It is a programming language.
• It is an interpreted language.
• It is object-based programming.
• It is widely used and supported
• It is accessible to the beginner.

Uses of JavaScript

• Use it to add multimedia elements: With JavaScript you can show, hide, change, resize images, and create image rollovers. You can create scrolling text across the status bar.

• Create pages dynamically: Based on the user's choices, the date, or other external data, JavaScript can produce pages that are customized to the user.

• Interact with the user: It can do some processing of forms and can validate user input when the user submits the form.

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