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In This Book You Will Learn What is JavaScript?-Was designed to add interactivity to HTML pages-Is a scripting language (a scripting language is a lightweight programming language)-JavaScript code is usually embedded directly into HTML pages-JavaScript is an interpreted language (means that scripts execute without preliminary compilation) 5 What can a JavaScript do?-JavaScript gives HTML designers a programming tool-JavaScript can put dynamic text into an HTML page-JavaScript can react to events-JavaScript can read and write HTML elements-JavaScript can be used to validate input data-JavaScript can be used to detect the visitor's browser-JavaScript can be used to create cookies 6 How to put a JavaScript code into an HTML page?How JavaScript was created.........................Standardizing JavaScript.........................................................Evolving JavaScript: don't break the web..................What are good references for JavaScript?..................How do I find out what JavaScript features are supported where?.....Where can I look up what features are planned for JavaScript?......Why does JavaScript fail silently so often?.................Why can't we clean up JavaScript, by removing quirks and outdated fea-tures?.....................................How can I quickly try out a piece of JavaScript code?........... SyntaxAn overview of JavaScript's syntax.................(Advanced)..............................Identifiers...............................Statement vs. expression.......................Ambiguous syntax..........................Semicolons..............................Automatic semicolon inse