Eric Ladd is the owner and chief developer for Rock Creek Web Solutions, a Web-based applications development firm in Arlington, Virginia. He is also a member of the Interactive Multimedia and Web Development faculty at the George Washington University in Washington, DC. Eric has worked on nearly a dozen titles for Que. Jim O'Donnell works as an aerospace engineer, building satellites in metropolitan Washington, DC. He has three programming & engineering degrees from Rensselaer Polytechnic Institute. Jim has been working as an author and technical editor for Macmillan Computer Publishing for four years, contributing to over 30 books, and co-authoring five.