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You should try the tutorial on this site: &nbsp;<a href="http://www.w3schools.com/js/default.asp" rel="ugc">http://www.w3schools.com/js/default.asp</a> &nbsp;The JavaScript programming language is included in all modern browsers.
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What is the name of the default JavaScript library? and how is it included? <br />
Why I am asking this question is<b> how does the window and document objects get created in JavaScript?</b><br />
Does the javascript engine automatically create them?
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What is the name of the default JavaScript library? and how is it included? 
Why I am asking this question is how does the window and document objects get created in JavaScript?
Does the javascript engine automatically create them?

Javascript default library

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.