If you have read the QuickStart guide to HTML, XHTML & CSS 6th edition, the concept is the same as you will learn how to begin to code in JavaScript and in AJAX with the help of mini tutorials and also being able to download these fully functional scripts from   the companion website as well.  This book also includes every single JavaScript function as well in the form of a flowchart in order for a JavaScript coder to understand how to write effective JavaScript and AJAX code.