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JavaScript and JSON Essentials by Sai Srinivas Sriparasa

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Chapter 1. JavaScript Basics

JavaScript, which was introduced as LiveScript by Netscape Communications Corp, has grown leaps and bounds in the last few years. JavaScript was originally developed to make web pages more interactive, and control the behavior of the page. JavaScript programs are commonly embedded inside an HTML file. HTML is a markup language, and does not manipulate the behavior of a page once its loaded. Using JavaScript, web developers can set rules and verify if the rules were followed, avoiding any remote server resources for input validation or complex number crunching. Today JavaScript is not just used for basic input validation; it is used to access the browser's Document object, to make asynchronous calls to the web server, ...

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