Positioning techniques are important elements to help understand CSS, and once understood, will give you the core abilities needed to sucessfully create CSS page layouts. Box models are defines as rectangular boxes that are created for every HTML markup element. The visual formatting for box models are organized into three elements o position, display, and float properties
Another aspect of positioning elements is backgrounds, which can be used to display colors and imapges into the background of your website. Every boxed element can be understood to have 2 different layes (fore-ground and back-ground), and one can display text and image while the other displays soild colors. Before CSS3 the only way you could edit backgrounds was by having solid colors and then adding a single background image ontop. Now, with the updated version, you can add multiple images and add gradient colors.
Vendor Specific Prefixes (VSPs) are used to help browser vendors adopt the CSS3 recommendations quickly and add new properties to the browser while indicating the implementations of the recommendated markups. VPSs always start with a hyphen, and are followed by the prefix name, and then another hyphen. "transform" is still in development to ensure it can work with the largest number of browsers.
