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What You Should Already Know Before you continue you should have a basic understanding of the following: HTML / XHTML If you want to study these subjects first, find the tutorials on our Language page . What is CSS? CSS stands for C ascading S tyle S heets Styles define how to display HTML elements Styles were added to HTML 4.0 to solve a problem External Style Sheets can save a lot of work External Style Sheets are stored in CSS files Styles Solved a Big Problem HTML was never intended to contain tags for formatting a document. HTML was intended to define the content of a document, like: <h1>This is a heading</h1> <p>This is a paragraph.</p> When tags like <font>, and color attributes were added to the HTML 3.2 specification, it started a nightmare for web developers. Development of large web sites, where fonts and color information were added to every single page, became a long and expensive process. To solve this probl...

JavaScript is the most popular scripting language on the internet, and works in all major browsers, such as Internet Explorer, Firefox, Chrome, Opera, and Safari. What You Should Already Know Before you continue you should have a basic understanding of the following: HTML and CSS If you want to study these subjects first, find the tutorials on our Languages page . What is JavaScript? JavaScript was designed to add interactivity to HTML pages JavaScript is a scripting language A scripting language is a lightweight programming language JavaScript is usually embedded directly into HTML pages JavaScript is an interpreted language (means that scripts execute without preliminary compilation) 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 ...