HTML, CSS and JavaScript study

http://code.google.com/edu/submissions/html-css-javascript/

HTML -> structure 

HTML is HyperText Markup Language.

HTML is a formatting language rather than programming language.

Data informs markup.

Recommended (HTML5) DOCTYPE

CSS -> presentation

CSS is Cascading Style Sheets

Inline, Embedded and External CSS.

CSS Semantic:Selector, Declaration, Cascade.

JavaScript -> behavior

JavaScript makes pages interactive.

Embedded JavaScript is easy for maintaining.

External JavaScript is great.

JavaScript is a programming language.

Variables, Operators, Strings, Arrays and Functions, Conditionals, Loops, Objects (Properties and Methods). 

The DOM (Document Object Model).

Events occur whenever actions happen on the page.

You can attach listener functions to an event on an element.

Object detection

You can change the style.

You can change the class(es).

You can alter default events. (Browsers have default events like having default CSS)