Michael Sabatino 
Understanding Coding with JavaScript [PDF ebook] 

Not to be confused with Java, Java Script serves a totally different purpose. As a scripting language, it provides support and extensions that have driven web development to new heights. Readers learn how to check the source code on many sites to find .js files written in Java Script. This book explores what Java Script does and how it is being used in new areas beyond the web. Clear diagrams, manageable text, and simple activities will get readers coding in basic Java Script in no time at all.