Don't be confused by 'The Missing Manual' series of books' title, so that worry about you can't understand this HTML5: The Missing Manual, 2nd Edition. In fact, there is no big deal, and your worry is unnecessary. There are a lot of readers as experienced web designers usually introduce this book like this - reading this book needs you to satisfy the following conditions: have written some simple web pages, know a little about CSS and a bit of JavaScript or jQuery.

PHP has become one of the world's most popular web programming languages from a tool used for producing personal web page. It ensures the operation of so many busiest websites on the Internet. This also brings the problems to be focused on, that's performance, maintainability, testability, reliability and the most important thing - security.

Head First Ajax will be a perfect learning experience to understand how to build a dynamic, interactive web application. Do not know how to start from Ajax (short for Asynchronous JavaScript + XML)? Don't worry, this book can help you out. You will master all the core concepts and enjoy happiness in the whole study process.