f other points, allowing them to be manipulated in arbitrary ways.</p>

<h1>JavaScript / ECMAScript</h1>
<p>This data source requires some knowledge of JavaScript, also known as ECMAScript. (The full specification for ECMAScript is available <a href="http://www.ecma-international.org/publications/standards/Ecma-262.htm" target="_blank">here</a>.) JavaScript is arguably the most popular scripting language in use today, it being the only language available for use in every popular web browser. The result is t