What is Java Script

What is JavaScript?

1. JavaScript was designed to add interactivity to HTML pages.
2. JavaScript is a scripting language
3. A scripting language is a lightweight programming language
4. A JavaScript consists of lines of executable computer code
5. A JavaScript is usually embedded directly into HTML pages
6. JavaScript is an interpreted language (means that scripts execute without preliminary compilation)
7. Everyone can use JavaScript without purchasing a license

Are Java and JavaScript the Same?

NO!
Java and JavaScript are two completely different languages in both concept and design!
Java (developed by Sun Microsystems) is a powerful and much more complex programming language - in the same category as C and C++.

What can a JavaScript Do?

1. JavaScript gives HTML designers a programming tool - HTML authors are normally not programmers, but JavaScript is a scripting language with a very simple syntax! Almost anyone can put small "snippets" of code into their HTML pages
2. JavaScript can put dynamic text into an HTML page - A JavaScript statement like this: document.write("h1" + name + "h1") can write a variable text into an HTML page
3. JavaScript can react to events - A JavaScript can be set to execute when something happens, like when a page has finished loading or when a user clicks on an HTML element
4. JavaScript can read and write HTML elements - A JavaScript can read and change the content of an HTML element
5. JavaScript can be used to validate data - A JavaScript can be used to validate form data before it is submitted to a server. This saves the server from extra processing
6. JavaScript can be used to detect the visitor's browser - A JavaScript can be used to detect the visitor's browser, and - depending on the browser - load another page specifically designed for that browser
7. JavaScript can be used to create cookies - A JavaScript can be used to store and retrieve information on the visitor's computer