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In this tutorial we discuss the basics and key concepts dealing with JavaScript as it applies to implementing JavaScript and using these JavaScript Libraries. Now, the point of JavaScript is to control the browser and to control how the browser reacts to user interaction. JavaScript, also known as ECMA 262 is a programming language that allows us to create engaging and interesting effects as well as functional elements to a web interface. JavaScript is supported in most modern browsers in some capacity and is therefore the de facto scripting language of web browsers. Of course, JavaScript can also be used in a large number of other places, including as a scripting language for an operating system and a scripting language inside some of the most popular graphics applications. As it is probably indicated in the title of this series, success with these libraries are dependent on some degree with the user's familiarity with JavaScript. However, as we will see, not all libraries require a lot of JavaScript knowledge. What I find interesting is that many of these libraries are inspired by other programming languages and you can see some of these programming languages influence in the libraries. Now, JavaScript has a distinct flavor of its own as it has been inspired and borrowed elements from a number of other C-based languages including C, C++, Java, Perl and others. JavaScript is a loosely-typed language, meaning that it does not require variables to hold data of a specific type so we can string data in for one loop through a cycle and then the next loop through a cycle we can put in numeric data and then after that we can put a Boolean value in. It doesn't require us to continue to put the same data in. Now, of course, this can either be a cursing or a bless, depending on how you feel about it, but it's the way that JavaScript is. Now, in order for you to proceed in our tutorial series, there's a bare minimum of things that you're going to need to understand. Now, in addition to understanding the HTML and the Cascading Style Sheets, you're going to need to know in JavaScript about variables, what they are, how to declare them and what they do. Next you'll need to know what functions are, how to build your own functions and call them. You're also going to need to know about event handling, how to set event handling up and what it really does. It's also going to be very beneficial if you understand what objects are and how they work inside of JavaScript and how to create your own custom JavaScript objects. Now, if you're looking at these and you say hey, wait. I'm not that comfortable with these things, I do recommend that you take a look at the other Virtual Training Company video tutorial series on JavaScript, as well as HTML and Cascading Style Sheets. These are great resources and so you should take advantage of them. And that covers the basics of what JavaScript is all about.