This presentation is based on the third chapter of my textbook Fundamentals of Web Development. The book is published by Addison-Wesley. It can be purchased via http://www.amazon.com/Fundamentals-Web-Development-Randy-Connolly/dp/0133407152. This book is intended to be used as a textbook on web development suitable for intermediate to upper-level computing students. It may also be of interest to a non-student reader wanting a single book that encompasses the entire breadth of contemporary web development. This book will be the first in what will hopefully be a textbook series. Each book in the series will have the same topics and coverage but each will use a different web development environment. The first book in the series will use PHP. To learn more about the book, visit http://www.funwebdev.com.