The Browser Environment | Object-Oriented JavaScript

DOM

The DOM (Document Object Model) is a way to represent an XML or an HTML document as a tree of nodes. Using DOM methods and properties, you can access any element on the page, modify or remove elements, or add new ones. The DOM is a language-independent API (Application Programming Interface) and can be implemented not only in JavaScript, but also in any other language. For example, you can generate pages on the server-side with PHP's DOM implementation (http://php.net/dom).

Take a look at this example HTML page:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
  <head>
    <title>My page</title>
  </head>
  <body>
    <p class="opener">first paragraph</p>
    <p><em>second</em> paragraph</p>
    <p id="closer">final</p>
    <!-- and that's about it -->
  </body>
</html>

Tak ing the second paragraph (<p&gt...

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Object-Oriented JavaScript

Object-Oriented JavaScript

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