About element positioning
Windows Internet Explorer supports the ability to position HTML elements in x-coordinates and y-coordinates, and to overlap elements in planes along the z-axis, which extends toward and away from the viewer in a web document. These capabilities let authors precisely place elements, images, controls, or text in a web page. By using scripts to manipulate the position coordinates and other dynamic styles, authors can move elements around a page, creating animated effects. The combination of dynamic styles, positioning, and transparent images presents authors with a rich set of animation options.