The Web, built on the concept of hyperlinking from document to document, is an interactive medium by nature. However, the vast majority of documents are modeled after static, print layouts.
“Interactivity,” as used in this chapter, refers to ways to make a web page less like a printed page and more like a CD-ROM or kiosk interface. Some features that set these media apart from print are:
integrated sound effects
elements (such as buttons) that respond to the position of the cursor
the ability for the user to manipulate what is on the screen
animation and video
Dynamic HTML (DHMTL), another increasingly popular alternative for adding motion and interactivity to web pages, is discussed in Chapter 24, in Part V of this book.
Flash is a ground-breaking multimedia format developed by Macromedia. Flash gives you the ability to create full-screen animation, interactive graphics, and integrated audio clips, all at remarkably small file sizes. Its magic lies in that it is a vector-based format (rather than bitmap), resulting in extremely compact files well-suited for web delivery.