Introduction to Dynamic Styles (Internet Explorer - DHTML)

http://msdn.microsoft.com/workshop/author/dynstyle/styles.asp

You can dynamically change the style of any HTML element in a document. You can change colors, fonts, spacing, indentation, position, and even the visibility of text. Because the Dynamic HTML (DHTML) Document Object Model (DOM) makes every HTML element and attribute accessible, it is easy to use scripts to dynamically read and change styles. The following section describes dynamic styles and provides a general explanation of how to use the object model to examine and modify styles.