w3schools    w3Schools
Search W3Schools :
   
HOME HTML CSS XML JAVASCRIPT ASP PHP SQL MORE...   References Examples Forum About
ADVERTISEMENTS

XML Certification
Download XML editor
Custom Programming
 
Table of contents
HTML DOM
DOM HOME
DOM Intro
DOM Nodes
DOM Node Tree
DOM Methods
DOM Node Access
DOM Node Info
DOM How To
DOM Events
DOM Reference
DOM Summary

DOM Examples
DOM Examples

DOM Objects
DOM Window
DOM Navigator
DOM Screen
DOM History
DOM Location

DOM Document

DOM Anchor
DOM Area
DOM Base
DOM Body
DOM Button
DOM Event
DOM Form
DOM Frame
DOM Frameset
DOM IFrame
DOM Image
DOM Input Button
DOM Input Checkbox
DOM Input File
DOM Input Hidden
DOM Input Password
DOM Input Radio
DOM Input Reset
DOM Input Submit
DOM Input Text
DOM Link
DOM Meta
DOM Object
DOM Option
DOM Select
DOM Style
DOM Table
DOM TableCell
DOM TableRow
DOM Textarea

Selected Reading
Web Statistics
Web Glossary
Web Hosting
Web Quality

W3Schools Tutorials
W3Schools Forum

Helping W3Schools

 

HTML DOM Properties and Methods

previous next

Properties and methods define the programming interface to the HTML DOM.


Programming Interface

The DOM models HTML as a set of node objects. The nodes can be accessed with JavaScript or other programming languages. In this tutorial we use JavaScript.

The programming interface to the DOM is defined by a set standard properties and methods.

Properties are often referred to as something that is (i.e. nodename is "p").

Methods are often referred to as something that is done (i.e. delete "p").


HTML DOM Properties

These are some typical DOM properties:

  • x.innerHTML - the inner text value of x (a HTML element)
  • x.nodeName - the name of x
  • x.nodeValue - the value of x
  • x.parentNode - the parent node of x
  • x.childNodes - the child nodes of x
  • x.attributes - the attributes nodes of x

Note: In the list above, x is a node object (HTML element).


HTML DOM Methods

  • x.getElementById(id) - get the element with a specified id
  • x.getElementsByTagName(name) - get all elements with a specified tag name
  • x.appendChild(node) - insert a child node to x
  • x.removeChild(node) - remove a child node from x

Note: In the list above, x is a node object (HTML element).


innerHTML

The easiest way to get or modify the content of an element is by using the innerHTML property.

innerHTML is not a part of the W3C DOM specification. However, it is supported by all major browsers.

The innerHTML property is useful for returning or replacing the content of HTML elements (including <html> and <body>), it can also be used to view the source of a page that has been dynamically modified.

Example

The JavaScript code to get the text from a <p> element with the id "intro" in a HTML document:

txt=document.getElementById("intro").innerHTML

After the execution of the statement, txt will hold the value "Hello World!"

Explained:

  • document - the current HTML document
  • getElementById("intro") - the <p> element with the id "intro"
  • innerHTML - the inner text of the HTML element

In the example above, getElementById is a method, while innerHTML is a property.

Try it yourself


childNodes and nodeValue

The W3C DOM specified way of getting to the content of an element works like this:

The JavaScript code to get the text from a <p> element with the id "intro" in a HTML document:

txt=document.getElementById("intro").childNodes[0].nodeValue

After the execution of the statement, txt will hold the value "Hello World!"

Explained:

  • document - the current HTML document
  • getElementById("intro") - the <p> element with the id "intro"
  • childNodes[0] - the first child of the <p> element (the text node)
  • nodeValue - the value of the node (the text itself)

In the example above, getElementById is a method, while childNodes and nodeValue are properties.

Try it yourself

In this tutorial we will mostly use the innerHTML property. However, learning the method above is useful for understanding the tree structure of the DOM and dealing with XML files.


previous next

The tools you need to build your web project!

Instant Demo

Ektron CMS400.NET Version 7.6 delivers all of the flexibility and features you need to deploy the Web site you want, quickly and efficiently.

learn more...

 

 

 

6 ways to take your site to the next level with Ektron:

Social Networking Create site stickiness through social networking. Keep it personal, relevant and interactive and they'll come back for more.
Open API Keep it open. Your site needs to be ready and able to connect to outside services. Ektron's open API gives you maximum flexibility.
Document Management Streamline content and document management. Users need to quickly and intuitively find and add information.
Content Authors Empower your content authors. Reduce IT bottlenecks by allowing business users to create and edit Web content and forms.
Taxonomy Climb to the top of search rankings. SEO tools, URL aliasing and eCommerce for your digital marketing strategy
Web 2.0 Tools Add powerful Web 2.0 tools like blogs, wikis, forums, geo-mapping, rating systems and RSS feeds easily.
See why there are 20,000+ Ektron integrations worldwide.
Request an INSTANT DEMO or download a FREE TRIAL today.

 
WEB HOSTING
dotnetbutton
Dynamic button image generation
$15 Domain Name
Registration
Save $20 / year!
Buy UK Domain Names
Register Domain Names
Cheap Domain Names
Cheap Web Hosting
Best Web Hosting
PHP MySQL Hosting
Top 10 Web Hosting
UK Reseller Hosting
Web Hosting
FREE Web Hosting
WEB BUILDING
Website Templates
Flash Templates
Website Builder
Internet Business Opportunity
Custom Programming
FREE Trial or Demo
Web Content Manager
Forms,Web Alerts,RSS
Download XML editor
FREE Flash Website
FREE Web Templates
EDUCATION
US Web Design Schools
HTML Certification
JavaScript Certification
XML Certification
PHP Certification
ASP Certification
Home HOME or Top of Page Validate   Validate   W3C-WAI level A conformance icon Printer Friendly  Printer Friendly

W3Schools is for training only. We do not warrant the correctness of its content. The risk from using it lies entirely with the user.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2009 by Refsnes Data. All Rights Reserved.