JavaScript Tutorials - Herong's Tutorial Examples - Version 2.21, by Dr. Herong Yang
DOM Level 1 - Example
This section provides a tutorial example of DOM Level 1 objects and attributes that are supported in Firefox 2.0.
DOM Level 1 - Latest version published in October, 1998: An API of 2 modules: Core and HTML. DOM Level 1 Core represents the functionality used for XML documents. DOM Level 1 HTML extends DOM Level 1 Core to represents functionality specific to HTML documents.
Here is a tutorial example of using DOM Level 1 objects and properties:
<html> <!-- DOM_Level_1_Example.html Copyright (c) 2013 by Dr. Herong Yang, herongyang.com --> <head> <title>DOM Level 1 Example</title> <script type="text/javascript"> var colorID = 0; function changeColor() { var body = document.body; if (colorID == 0 ) body.bgColor = "#ff8888"; else if (colorID == 1 ) body.bgColor = "#88ff88"; else if (colorID == 2 ) body.bgColor = "#8888ff"; else if (colorID == 3 ) body.bgColor = "#888888"; document.forms.item(0).elements.item(0).value = document.body.bgColor; colorID = (colorID+1)%4; } </script> </head> <body color="#000000"> <pre> <script type="text/javascript"> var body = document.body; document.writeln("\"documnet.body\" attribute initial values:"); document.writeln(" aLink = "+body.aLink); document.writeln(" background = "+body.background); document.writeln(" bgColor = "+body.bgColor); document.writeln(" color = "+body.color); document.writeln(" link = "+body.link); document.writeln(" vLink = "+body.vLink); </script> </pre> <form> Current document.body.bgColor: <input type="text" name="bgcolor" value="#ffffff"><br/> <input type="button" value="Click to change background color" onClick="changeColor();"/> </form> </body> </html>
Here is how this JavaScript page will look like on Firefox 2.0:
It is interesting to see that document.body.color is undefined in Firefox 2.0. My guess is that document.body.color in supported in only in DOM HTML Level 1, not in Level 2. Since Firefox is supporting DOM HTML Level 2, document.body.color is undefined.
Table of Contents
ECMAScript Language Specification and JavaScript Dialects
Data Types, Variables and Expressions
Creating, Accessing, and Manipulating Arrays
Defining and Calling Functions
Web Browser Supporting JavaScript
Server-Side and Client-Side Web Scripting
Defining Your Own Object Types
Inheritance of Properties and Methods through the Prototype Object Chain
'jrunscript' - JavaScript Shell Command from JDK
Using Functions as "Function" Objects
Introduction to Built-in Object Types
►W3C's Document Object Model (DOM) Specifications
Overview of DOM Specifications
DOM Level Test - document.implementation.hasFeature
Inheritance vs. Flattened Views of the API
A Web Document as A Tree of Different Interfaces
A Web Document as A Tree of Nodes
Dump Document in a New Window - JavaScript Source
Dump Document in a New Window - Firefox 2.0 Result