What is JavaScript ?
JavaScript is a scripting language used to create and control dynamic website content, i.e. anything that moves, refreshes, or otherwise changes on your screen without requiring you to manually reload a web page. Features like: animated graphics, photo slideshows, autocomplete text suggestions, interactive forms.

this application give you a very simple introduction to start with JavaScript By viewing the following themes:
1) JavaScript tutorial
2) Control Statements
3) Functions
4) Arrays
5) Object Constructors
7) Prototypes
8) classes