1) Layer structure of HTML / HTML5
Skeleton pages, HTML is the carrier web content, content that web authors on the page you want to allow users to browse the information, can contain text, pictures, video and so on.
2) pattern layer CSS / CSS3
CSS is a style show. Like coat page, for example, the title font, color change, or title add background images, borders, etc., all of which is used to change the content of the appearance of something called performance.
3) behavior layer Javascript
JavaScript is used to achieve special effects on a Web page. Such as: mouse over pop-up drop-down menu. Or change the background color of the mouse over the table. There are the focus of news (news photos) rotation. It can be understood, animation, there are interactions are generally implemented in JavaScript.