Free JavaScript Download
You don't have to pay for JavaScript, and you don't have to write it yourself either -- unless you want to. We'll help you understand your options for finding, downloading, and customizing free JavaScript code.

Final Javascript Quiz
Learn Javascript Final Javascript Quiz Tutorials Object Oriented Javascript Defining Classes Putting

Numbers to Words
Numbers to Words Join the Discussion Questions? Comments? Related Articles Formatting Numbers Roman Numerals

What Is JavaScript?
JavaScript is a popular programming language that's built into all the major web browsers and used to make web pages interactive. This article will answer all your basic questions about what JavaScript is and how to use it -- even if you aren't a computer programmer.

Using window.onload
Using window.onload Join the Discussion Questions? Comments? Some scripts require that you run something

Returning a Value
As well as being able to pass parameters to a function in JavaScript, we can also return a value from the function.

Radio Button Validation
Radio Button Validation The setup and validation of radio buttons appears to be the form field that gives

Print Button
Print Button Join the Discussion Questions? Comments? You can easily add a print button or link to your

Modal Windows
Modal Windows Join the Discussion Questions? Comments? Related Resources Modal Dialog Box Creating a

Analysis Quiz
Analysis Quiz 1. Quiz Head Script Basic Help Using Pre-written Scripts More of this Feature Quiz Body

JavaScript 101
Want to use JavaScript on your web pages? There are several alternatives.

A Shorter IF Statement
When you are assigning different values to a single field depending on a condition, JavaScript provides a way to combine the decision into the assignment.

13. Ternary Operator
The ternary operator provides a shorter way of writing some JavaScript if statements as this example demonstrates.

document.write
document.write Join the Discussion Questions? Comments? A lot of people, particularly those first starting

Ajax - Asynchronous
When should you use asynchronous Ajax calls and when should you use synchronous.

Adding Validation to the Submit Button
Validate on Submit 2. Submit Button Join the Discussion Questions? Comments? More of this Feature Why

Back Button
Back Button or Link Join the Discussion Questions? Comments? So you would like to put a link on your

The IF Statement
Learn Javascript The IF Statement Join the Discussion Questions? Comments? More of this Tutorial The

Bulletin Board / Forum Code Converter
Bulletin Board / Forum Code Converter Join the Discussion Questions? Comments? At some stage you will

Modal Dialog Box
Modal Dialog Box Part 1 : Introduction and Sample Page Basic Help Using Pre-written Scripts More of this

Common Javascript Errors
Commonly made Javascript errors and how to find them

Javascript and XHTML
Javascript and XHTML Join the Discussion Questions? Comments? With HTML pages on the web you can just

Passing Parameters
Learn Javascript Passing Parameters Join the Discussion Questions? Comments? More of this Tutorial Functions

Target Window or Frame
Target Window or Frame Join the Discussion Questions? Comments? With an ordinary HTML link using the

What is JavaScript Used For?
Just where does JavaScript fit into the overall picture when it comes to building web pages correctly.

Dynamic Dropdown Two Selects
Dynamic Dropdowns Based on Another Dropdown Join the Discussion Questions? Comments? More of This Feature

getElementsByClassName
The Javascript DOM 8. getElementsByClassName Join the Discussion Questions? Comments? More of this Feature

Hello World
Learn JavaScript Hello World Join the Discussion Questions? Comments? More of this Tutorial Getting Started

Adding Javascript from Javascript
Adding Javascript from Javascript Join the Discussion Questions? Comments? One thing that Javascript

DOM: 8. Get Child Nodes
The property allowing us to access the nodes contained within the current node is actually a nodelist since a node can of course contain more than one node.

JavaScript and HTML
JavaScript and HTML Join the Discussion Questions? Comments? There are four different ways to attach

Positioning the Popup Window
Changing the size of the popup window.: sans serif font left position popup windows desired position body background

Making JavaScript Unobtrusive
How to separate the JavaScript in your web page from the HTML and put it in its own file.

Strings to Numbers
How to convert text strings to numbers in JavaScript.

How to attach JavaScript into Your Page.
How to Attach JavaScript into Your Page. Join the Discussion Questions? Comments? To be able to use JavaScript

Recursive Calls in JavaScript
There are two ways of setting up recursive function calls in JavaScript

Last Modified Date
Last Modified Date Join the Discussion Questions? Comments? Are you wondering just how current the information

Nesting If Statements
You can nest one IF statement inside another using JavaScript.

Prebuilt
Easy tests to determine if pre-built scripts have been properly tested by their author

DOM: 7. Get Parent Node
Node properties don't just include pointers to the immediately adjacent sibling nodes, there is also a pointer to the parent node (the tag within which the current element or text is contained).

Basic Popup Windows
Popup Windows 1. Basic Popup Windows Join the Discussion Questions? Comments? With HTML you can open

Frames and Multiple Domains
For security reasons Javascripts can't communicate between frames loaded from different domains.

Event Listeners
The Javascript DOM 19. Event Listeners Join the Discussion Questions? Comments? More of this Feature

Tools for Making JavaScript
What tools do you need to write JavaScript?

Passing Parameters Via Query Strings
Passing Parameters Via Query Strings 1. Write Querystrings Join the Discussion Questions? Comments? More

Creating a Combo Box
Site Navigation 7. Combo Box Join the Discussion Questions? Comments? More of this Feature Introduction

Comparison Operators
JavaScript uses a number of operators to handle the comparisons that need to be made between two fiends

No Right Click Script
No Right Click Script Join the Discussion Questions? Comments? Related Resources View Source Bookmarklet

Obtaining Your Visitor's IP Address
Obtaining Your Visitor's IP Address Join the Discussion Questions? Comments? JavaScript itself has no

Dynamic Dropdown Three Selects
Three Dynamic Dropdowns Sample and HTML Join the Discussion Questions? Comments? More of This Feature

The Javascript Tooltip
This is a Javascript Tooltip Please visit my site Extended Tooltip 1. Introduction and Sample Basic Help

Sample Hangman
Hangman Sample Game with Images More of this Feature The Body Script Alternate Body The Head Script The

Hex to Decimal and Decimal to Hex
Hex to Decimal and Decimal to Hex Join the Discussion Questions? Comments? A number of computer related

setTimeout or setInterval
setTimeout or setInterval Join the Discussion Questions? Comments? Glossary setTimeout setInterval The

Convert to Roman Numerals
Convert to Roman Numerals Join the Discussion Questions? Comments? Elsewhere on About What are Roman

getElementsByTagName
The Javascript DOM 7. getElementsByTagName Join the Discussion Questions? Comments? More of this Feature

JavaScript and Emails
Why not to use JavaScript with emails? Well there are some good reasons why JavaScript and Emails don't go together.

Google Maps - Adding a Description to a Marker
Google Maps Adding a Description to a Marker More of this Tutorial Get an API Adding a Map Zooming In

The CASE Statement
Learn Javascript The CASE Statement Join the Discussion Questions? Comments? More of this Tutorial The

Google Maps - Satellite Images
Google Maps Satellite Images More of this Tutorial Get an API Adding a Map Zooming In and Out Latitude

JavaScript and Unicode
JavaScript can work with unicode as well as ASCII.

Drop Down List Validation
Drop Down List Validation Join the Discussion Questions? Comments? Validation of dropdown lists is fairly

JavaScript Execution Order
What order does JavaScript run its code in?

External Javascripts
Learn Javascript External Javascripts Join the Discussion Questions? Comments? More of this Tutorial

Using Modal Dialog Box Javascript
Modal Dialog Box Part 3 : Use the Script More of this Feature Introduction and Sample Obtain the Script

Page Events
Learn Javascript Page Events Join the Discussion Questions? Comments? More of this Tutorial Form Events

Javascript Format and Colour
Javascript Formatter Related Articles Javascript Compressor Does your Javascript code look a mess? Are

Function to Read Parameters Passed Via Query Strings
Passing Parameters Via Query Strings 2. The Read Function Join the Discussion Questions? Comments? More

Calendar Generator
Create the HTML code for a calendar to add to your page

innerHTML
The Javascript DOM 6. innerHTML Join the Discussion Questions? Comments? More of this Feature Introduction

Google Maps - Adding a Marker
Google Maps Adding a Marker More of this Tutorial Get an API Adding a Map Zooming In and Out Latitude

Table Generator
Table Generator Join the Discussion Questions? Comments? Creating a table to display tabular data in

Alert and Confirm
Learn Javascript Alert and Confirm Join the Discussion Questions? Comments? More of this Tutorial Comments

Deleting Cookies
Deleting Cookies Join the Discussion Questions? Comments? More About Cookies Writing Cookies Reading

Defining Classes
Learn Javascript Defining Classes Join the Discussion Questions? Comments? More of this Tutorial Object

What Version of Javascript
What Version of Javascript Join the Discussion Questions? Comments? Glossary Javascript ECMAscript Javascript

Getting Started
Introduction to a series of tutorials on programming with JavaScript

Ajax - Get or Post
When should you use GET and when should you use POST with Ajax.

Equals, Equals Equals, or Equals Equals Equals
Using one, two or three equals signs in Javascript depending on what you need to achieve

Quiz Script Generator
Multiple Choice Quiz Maker 1. Question/Answer Script Basic Help Using Pre-written Scripts More of this

JavaScript Encryption
JavaScript Encryption Join the Discussion Questions? Comments? There are a number of things that are

Calendar Popup Script
Calendar Popups 1. The Calendar Script Join the Discussion Questions? Comments? More of this Feature

Cryptogram Script Sample
Cryptogram Script 1. Introduction and Sample Basic Help Using Pre-written Scripts More of this Feature

Returning Multiple Values
Returning Multiple Values Join the Discussion Questions? Comments? You can pass multiple values to a

href="#"
A # by itself in the href attribute is not valid. Sites teaching you how to write HTML and JavaScript use it as a placeholder that should be replaced in live code with a real destination.

Week of Year Date Method
Week of Year Adding to the Date Object Join the Discussion Questions? Comments? Related Resources Day

Mouse Cursor Position
Mouse Cursor Position Join the Discussion Questions? Comments? Until recently there was no standard way

Validate on Submit
Validate on Submit 1. Why Validate Join the Discussion Questions? Comments? More of this Feature Submit

Hiding Your Email Address
Hiding Your Email Address Join the Discussion Questions? Comments? Related Resources Email Address Validation

Writing Cookies
Writing Cookies Join the Discussion Questions? Comments? More About Cookies Reading Cookies Deleting

Collapsible Menu HTML
Collapsible Menu 4. Adding Menus Join the Discussion Questions? Comments? More of this Feature Introduction

Head Scripts and Body Scripts
Head Scripts and Body Scripts Join the Discussion Questions? Comments? You don't need to be able to write

Modal Dialog Box Javascript
Modal Dialog Box Part 2 : Obtain the Script More of this Feature Introduction and Sample Use the Script

JavaScript and JScript
JavaScript and JScript, different languages for different browsers.

Submitting after validation
Validate on Submit 3. Submit If Valid Join the Discussion Questions? Comments? More of this Feature Why

Array Maximum and Minimum Values
Array Maximum and Minimum Values Join the Discussion Questions? Comments? One of the advantages to JavaScript

Faster Loading Web Pages
Faster Loading Web Pages Having any JavaScript in your web page will slow down the loading of the page.

Defining Variables
Learn Javascript Defining Variables Join the Discussion Questions? Comments? More of this Tutorial Getting

Using Pre-written JavaScript
The actual steps required to use a pre-written JavaScript with your page are not always included with the script. Here is a step by step list of what you need to do in order to be able to use any pre-written JavaScript in your page. You will still need to refer to the instructions with the script for the details though.

Alternatives to eval
Alternatives to "eval" Join the Discussion Questions? Comments? One Javascript command that gets used

Disabling the Default Action
How to bypass the default action when you have alternate Javascript processing to replace it.

Using NOSCRIPT
Learn Javascript Using Noscript Join the Discussion Questions? Comments? More of this Tutorial External

Disable Form Fields
Disable Form Fields Join the Discussion Questions? Comments? Sometimes when you have a form for your

Counting Words
Counting Words Basic Help Using Pre-written Scripts Have you ever thought that it would be useful to

Date and Time
Learn Javascript Date and Time Join the Discussion Questions? Comments? More of this Tutorial Mathematical

Distance Calculator
Distance Calculator 1. Introduction and Sample Basic Help Using Pre-written Scripts More of this Feature

Finding and Fixing Errors
Learn Javascript Finding and Fixing Errors Join the Discussion Questions? Comments? More of this Tutorial

Event Calendar Javascript
Event Calendar 2. Get the Javascript Join the Discussion Questions? Comments? More of this Feature Introduction

What Javascript Can Not Do
There are a few things that the JavaScript programming language does not let you do

Multiple Choice Quiz Script Sample
Multiple Choice Example Quiz Basic Help Using Pre-written Scripts Create Your Own Quiz Question/Answer

Calculator Tutorial
A series of tutorials explaining one way to use Javascript to create a calculator.

JavaScript Alert
The alert built in function provides JavaScript with a very basic debuggung tool.

\$ and _ in JavaScript
The $ and _ characters are treated differently in JavaScript to the way you might expect. JavaScript considers them to be letters in some circumstances rather than special characters.

Five Most Common Coding Errors
The five worst pieces of code that people use with Javascript and which you ought to avoid.

Cross Browser Ticker/Marquee Example
Cross Browser Ticker/Marquee 1. Introduction and Sample Basic Help Using Pre-written Scripts More of

responseText and responseXML
Introduction to Ajax 8. responseText and responseXML Join the Discussion Questions? Comments? More of

JavaScript Date Selection Correcting Days in Month
Date Selection Correct Days in Month Dropdown List One way of having your visitors enter a date into

Optional Parameters
JavaScript has its own unique way of handling where you want parameters to your function to be optional.

removeChild
The Javascript DOM 9. removeChild Join the Discussion Questions? Comments? More of this Feature Introduction

Continuous Text Marquee Code
Continuous Text Marquee 2. Obtain the Script More of this Feature Example Add to Your Page The first

Day of Year Date Method
Day of Year Adding to the Date Object Join the Discussion Questions? Comments? Related Resources Week

Submit the form only once
Validate on Submit 4. Avoid Multiple Submits Join the Discussion Questions? Comments? More of this Feature

Timed Window Close
Setting your pupup window to automatically close after a set time.

Piano Chord Calculator
Piano Chord Calculator 1. Introduction and Sample Basic Help Using Pre-written Scripts More of this Feature

Cookies: 1. Write A Session Cookie
A session cookie keeps data until the browser is closed.

HTML in Javascript
HTML to Javascript Converter Join the Discussion Questions? Comments? To ensure that any HTML that you

Reserved Words
Reserved Words The following are Reserved Words in Javascript. This list of reserved words includes several

JavaScript By Example
A series of example JavaScript that shows you how to write JavaScript.

Disable No Right Click Scripts
Disable No Right Click Scripts Join the Discussion Questions? Comments? Related Resources View Source

Using Functions: 10. Callback Functions
JavaScript allows you to pass a function to another function as a parameter and then call back to that function from within the function you pass it to.

JavaScript Multiple Tests – And, Or, and Not
A series of tutorials introducing JavaScript decision making

Month and Day Names
Add month and day name methods to your dates.: monday tuesday wednesday javascript language january february march april january february march numerical values

Multiple Personality Quiz
Multiple Personality Quiz 1. Quiz Head Script Join the Discussion Questions? Comments? More of this Feature

Google Maps - Latitude and Longitude
Google Maps Latitude and Longitude More of this Tutorial Get an API Adding a Map Zooming In and Out Adding

First Time Only
First Time Only 1. Introduction and Sample Join the Discussion Questions? Comments? More of this Feature

Password Generator
Password Generator Join the Discussion Questions? Comments? Tutorials How it Works For maximum security

Comments
Learn Javascript Comments Join the Discussion Questions? Comments? More of this Tutorial Alert and Confirm

A Brief History of Javascript
What is Javascript, who created it, and who controls the standards?

Analog Clock Script
Analog Clock 1. Introduction Basic Help Using Pre-written Scripts More of this Feature The Head Script

Drop Down Lists
Site Navigation 1. Introduction Join the Discussion Questions? Comments? More of this Feature Drop Down

Cross Browser Ticker/Marquee Script RtoL
Cross Browser Ticker/Marquee 2a. Obtain the Right to Left Script More of this Feature Introduction LtoR

Making it Move
This is a web page object. move Web Page Animation 7. Making it Move Join the Discussion Questions? Comments?

Random Array Sort
Random Array Sort Join the Discussion Questions? Comments? Related Resources Numeric Sort Ignore Case

The Tooltip Script
Extended Tooltip 2. The Script Join the Discussion Questions? Comments? More of this Feature Introduction

Window Close
Window Close Join the Discussion Questions? Comments? In my series of articles on popup windows I go

Events: 4. Prevent Default
Where an element has a default action that it performs that is not dependent on JavaScript we may need to disable that default when JavaScript is enabled.

Form Events
Learn Javascript Form Events Join the Discussion Questions? Comments? More of this Tutorial Page Events