JavaScript is a Scripting Language

A scripting language is a lightweight programming language.
JavaScript is programming code that can be inserted into HTML pages.
JavaScript inserted into HTML pages, can be executed by all modern web browsers.
JavaScript is easy to learn.

JavaScript: Writing Into HTML Output

Example

document.write("<h1>This is a heading</h1>");
document.write("<p>This is a paragraph</p>"); 

JavaScript: Reacting to Events

Example

<button type="button" onclick="alert('Welcome!')">Click Me!</button>

                             

     IMPORTANT LINKS TO LEARN MORE

      http://www.w3schools.com/js/default.asp

      http://www.tizag.com/javascriptT/