HTML (Hypertext Markup Language) is a text-based approach to describing how content contained within an HTML file is structured. This markup tells a web browser how to display text, images and other ...

Semantic Checker is a new and still experimental Firefox addon (download it here) highlighting semantic elements in the web page you are currently viewing. The tool should be used for on-page analysis ...

To use positioning on an element, you must first declare its position property to be absolute or relative: H1 { position: absolute } Then you can add whatever ...

One of the more important details of understanding and using Cascading Style Sheets (CSS) is the cascading aspect of its name. That is, how are multiple rules for the same element handled? This week, ...