This book provides a comprehensive introduction to the latest version of HTML 4.01, including basic knowledge of HTML, development status, HTML document structure, the importance of cascading style sheets, adding multimedia to web pages, achieving interactivity, etc. And introduces the specific implementation method of dynamic HTML. This book also particularly emphasizes the idea of HTML 4 approach. This book is not only suitable for readers who have some experience in making HTML web pages, but also for beginners of HTML. This book is a truly practical encyclopedia about HTML.