DHTML Document Object Model

The Document Object Model gives us access to every element in a document.

Examples

Note: Most of the DHTML examples require IE 4.0 or higher.

Element access
How to access an element and change the style.

Attribute change
How to access an image element and change the "src" attribute.

innertext access
How to access and change the inner text of an element.

How to access an element?

The element must have an id attribute defined and a scripting language is needed. JavaScript is the most browser compatible scripting language, so we use JavaScript.

<html>
<body>

<h1 id="header">My header</h1>

<script type="text/javascript">
header.style.color="red"
</script>

</body>
</html>

The script changes the color of the header element, and produces this output.

My header

The DHTML Document Object Model

Object		Description
window	methods properties	The window object is the top level object in the DHTML DOM. It contains information about the window and the frames
document	methods properties collections	The document object represents the HTML document, and is used to access the HTML elements inside the document
navigator	properties	The navigator object contains information about the user's browser
event	properties collections	The event object contains information about events that occurs

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