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JavaScript: Most Popular Articles

These articles are the most popular over the last month.
Looking to Download JavaScript Snippets? Here's...
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.
Referring Site
Referring Site Join the Discussion Questions? Comments? The above line (if there is one) contains the
Final Javascript Quiz
Learn Javascript Final Javascript Quiz Tutorials Object Oriented Javascript Defining Classes Putting
Do This Instead of Updating Global Variables in...
As well as being able to pass parameters to a function in JavaScript, we can also return a value from the function.
Numbers to Words
Numbers to Words Join the Discussion Questions? Comments? Related Articles Formatting Numbers Roman Numerals
Using window.onload
Using window.onload Join the Discussion Questions? Comments? Some scripts require that you run something
Analysis Quiz
Analysis Quiz 1. Quiz Head Script Basic Help Using Pre-written Scripts More of this Feature Quiz Body
Are JavaScript and Java the Same Language?
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.
Modal Windows
Modal Windows Join the Discussion Questions? Comments? Related Resources Modal Dialog Box Creating a
JavaScript Making Decisions
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.
What is JavaScript Used For?
Just where does JavaScript fit into the overall picture when it comes to building web pages correctly.
Bulletin Board / Forum Code Converter ...
Bulletin Board / Forum Code Converter Join the Discussion Questions? Comments? At some stage you will
Print Button
Print Button Join the Discussion Questions? Comments? You can easily add a print button or link to your
Adding Validation to the Submit Button ...
Validate on Submit 2. Submit Button Join the Discussion Questions? Comments? More of this Feature Why
document.write
document.write Join the Discussion Questions? Comments? A lot of people, particularly those first starting
Radio Button Validation
Radio Button Validation The setup and validation of radio buttons appears to be the form field that gives
Dynamic Dropdown Three Selects
Three Dynamic Dropdowns Sample and HTML Join the Discussion Questions? Comments? More of This Feature
Target Window or Frame
Target Window or Frame Join the Discussion Questions? Comments? With an ordinary HTML link using the
Dynamic Dropdown Two Selects
Dynamic Dropdowns Based on Another Dropdown Join the Discussion Questions? Comments? More of This Feature
Ajax
When should you use asynchronous Ajax calls and when should you use synchronous.
Last Modified Date
Last Modified Date Join the Discussion Questions? Comments? Are you wondering just how current the information
Hello World
Learn JavaScript Hello World Join the Discussion Questions? Comments? More of this Tutorial Getting Started
Deleting Cookies
Deleting Cookies Join the Discussion Questions? Comments? More About Cookies Writing Cookies Reading
The IF Statement
Learn Javascript The IF Statement Join the Discussion Questions? Comments? More of this Tutorial 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
JavaScript By Example
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.
Recursive Calls in JavaScript
There are two ways of setting up recursive function calls in JavaScript
JavaScript 101
Want to use JavaScript on your web pages? There are several alternatives.
JavaScript Execution Order
What order does JavaScript run its code in?
Javascript and XHTML
Javascript and XHTML Join the Discussion Questions? Comments? With HTML pages on the web you can just
Obtaining Your Visitor's IP Address
Obtaining Your Visitor's IP Address Join the Discussion Questions? Comments? JavaScript itself has no
\$ 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.
Modal Dialog Box
Modal Dialog Box Part 1 : Introduction and Sample Page Basic Help Using Pre-written Scripts More of this
Drop Down List Validation
Drop Down List Validation Join the Discussion Questions? Comments? Validation of dropdown lists is fairly
Passing Parameters
Learn Javascript Passing Parameters Join the Discussion Questions? Comments? More of this Tutorial Functions
Positioning the Popup Window
Changing the size of the popup window.: sans serif font left position popup windows desired position body background
Defining Classes
Learn Javascript Defining Classes Join the Discussion Questions? Comments? More of this Tutorial Object
Adding Javascript from Javascript
Adding Javascript from Javascript Join the Discussion Questions? Comments? One thing that Javascript
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
Sample Hangman
Hangman Sample Game with Images More of this Feature The Body Script Alternate Body The Head Script The
External Javascripts
Learn Javascript External Javascripts Join the Discussion Questions? Comments? More of this Tutorial
No Right Click Script
No Right Click Script Join the Discussion Questions? Comments? Related Resources View Source Bookmarklet
Back Button
Back Button or Link Join the Discussion Questions? Comments? So you would like to put a link on your
Passing Parameters Via Query Strings ...
Passing Parameters Via Query Strings 1. Write Querystrings Join the Discussion Questions? Comments? More
Returning Multiple Values
Returning Multiple Values Join the Discussion Questions? Comments? You can pass multiple values to a
Array Maximum and Minimum Values
Array Maximum and Minimum Values Join the Discussion Questions? Comments? One of the advantages to JavaScript
Thumbnail Image Popups
Popup Windows 8. Thumbnail Image Popups Join the Discussion Questions? Comments? More of this Feature
Quiz Script Generator
Multiple Choice Quiz Maker 1. Question/Answer Script Basic Help Using Pre-written Scripts More of this
JavaScript and HTML
JavaScript and HTML Join the Discussion Questions? Comments? There are four different ways to attach
Password Generator
Password Generator Join the Discussion Questions? Comments? Tutorials How it Works For maximum security
Creating a Combo Box
Site Navigation 7. Combo Box Join the Discussion Questions? Comments? More of this Feature Introduction
Daylight Saving Time
Daylight Saving Time Adding Methods to the Date Object One flag missing from the information that the
innerHTML
The Javascript DOM 6. innerHTML Join the Discussion Questions? Comments? More of this Feature Introduction
Alternatives to eval
Alternatives to "eval" Join the Discussion Questions? Comments? One Javascript command that gets used
Equals, Equals Equals, or Equals Equals Equals
Using one, two or three equals signs in Javascript depending on what you need to achieve
Basic Popup Windows
Popup Windows 1. Basic Popup Windows Join the Discussion Questions? Comments? With HTML you can open
Week of Year Date Method
Week of Year Adding to the Date Object Join the Discussion Questions? Comments? Related Resources Day
Calendar Generator
Create the HTML code for a calendar to add to your page
Multiple Choice Quiz Script Sample
Multiple Choice Example Quiz Basic Help Using Pre-written Scripts Create Your Own Quiz Question/Answer
Function to Read Parameters Passed Via Q...
Passing Parameters Via Query Strings 2. The Read Function Join the Discussion Questions? Comments? More
setTimeout or setInterval
setTimeout or setInterval Join the Discussion Questions? Comments? Glossary setTimeout setInterval The
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
Alert and Confirm
Learn Javascript Alert and Confirm Join the Discussion Questions? Comments? More of this Tutorial Comments
Page Events
Learn Javascript Page Events Join the Discussion Questions? Comments? More of this Tutorial Form Events
The CASE Statement
Learn Javascript The CASE Statement Join the Discussion Questions? Comments? More of this Tutorial The
Multiple Personality Quiz
Multiple Personality Quiz 1. Quiz Head Script Join the Discussion Questions? Comments? More of this Feature
Mouse Cursor Position
Mouse Cursor Position Join the Discussion Questions? Comments? Until recently there was no standard way
Continuous Text Marquee Code
Continuous Text Marquee 2. Obtain the Script More of this Feature Example Add to Your Page The first
Event Listeners
The Javascript DOM 19. Event Listeners Join the Discussion Questions? Comments? More of this Feature
Convert to Roman Numerals
Convert to Roman Numerals Join the Discussion Questions? Comments? Elsewhere on About What are Roman
Disable No Right Click Scripts
Disable No Right Click Scripts Join the Discussion Questions? Comments? Related Resources View Source
Hiding Your Email Address
Hiding Your Email Address Join the Discussion Questions? Comments? Related Resources Email Address Validation
Using Modal Dialog Box Javascript
Modal Dialog Box Part 3 : Use the Script More of this Feature Introduction and Sample Obtain the Script
getElementsByClassName
The Javascript DOM 8. getElementsByClassName Join the Discussion Questions? Comments? More of this Feature
++i and i++
For those new to programming the difference between ++i and i++ is not obvious. Here's a simple example to explain the difference.
Adding Days to a Date
Adding Days to a Date Join the Discussion Questions? Comments? Adding or subtracting a number of days
The Javascript Tooltip
This is a Javascript Tooltip Please visit my site Extended Tooltip 1. Introduction and Sample Basic Help
Timed Window Close
Setting your pupup window to automatically close after a set time.
Head Scripts and Body Scripts
Head Scripts and Body Scripts Join the Discussion Questions? Comments? You don't need to be able to write
How Hard is JavaScript To Learn?
How difficult something is to learn depends on what you already know and how similar the new thing is to what you know.
Submitting after validation
Validate on Submit 3. Submit If Valid Join the Discussion Questions? Comments? More of this Feature Why
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
JavaScript and Emails
Why not to use JavaScript with emails? Well there are some good reasons why JavaScript and Emails don't go together.
Getting Rid of document.write
The document.write statement was an essential part of early JavaScripts but is now completely unnecessary as anything that can be done with document.write can be done better using innerHTML.
JavaScript and Unicode
JavaScript can work with unicode as well as ASCII.
Window Close
Window Close Join the Discussion Questions? Comments? In my series of articles on popup windows I go
Day of Year Date Method
Day of Year Adding to the Date Object Join the Discussion Questions? Comments? Related Resources Week
Counting Words
Counting Words Basic Help Using Pre-written Scripts Have you ever thought that it would be useful to
First Time Only
First Time Only 1. Introduction and Sample Join the Discussion Questions? Comments? More of this Feature
Moving JavaScript out of the Web Page
When you first write a new JavaScript the easiest way to set it up is to embed the JavaScript code directly into the web page.
Disabling the Default Action
How to bypass the default action when you have alternate Javascript processing to replace it.
Writing Cookies
Writing Cookies Join the Discussion Questions? Comments? More About Cookies Reading Cookies Deleting
Hide Until Page Finishes Loading
Web Page Animation 2. Hide Until Page Loaded Join the Discussion Questions? Comments? More of this Feature
Collapsible Menu HTML
Collapsible Menu 4. Adding Menus Join the Discussion Questions? Comments? More of this Feature Introduction
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.
Built-in Functions: alert, confirm, prompt
JavaScript provides built in functions to display dialog boxes
Common Javascript Errors
Commonly made Javascript errors and how to find them
Concentration Memory Game with Images Sa...
Concentration Memory Game With Images 1. Introduction and Sample More of this Feature Head Script Body
JavaScript and JScript : What's the Difference?
JavaScript and JScript, different languages for different browsers.
JavaScript Date Selection Correcting Days in...
Date Selection Correct Days in Month Dropdown List One way of having your visitors enter a date into
Random Array Sort
Random Array Sort Join the Discussion Questions? Comments? Related Resources Numeric Sort Ignore Case
Javascript Format and Colour
Javascript Formatter Related Articles Javascript Compressor Does your Javascript code look a mess? Are
What Version of Javascript
What Version of Javascript Join the Discussion Questions? Comments? Glossary Javascript ECMAscript Javascript
Print Directly to Printer
An explanation of some of the reasons why Javascript can't print a page without the print dialog popping up.
hasOwnProperty
JavaScript Glossary definition for: hasOwnProperty
Follow the Mouse Sample
Follow the Mouse 1. Introduction Basic Help Using Pre-written Scripts More of this Feature Obtain the
Five Most Common Coding Errors
The five worst pieces of code that people use with Javascript and which you ought to avoid. Page 4.
Script Index
Script Index Join the Discussion Questions? Comments? I have now added so many scripts to this site that
Why JavaScript
How should you use JavaScript so that it enhances your site.
Getting Started
Introduction to a series of tutorials on programming with JavaScript
Block Exit Blockers User Script
Block Exit Blockers User Script Join the Discussion Questions? Comments? Related Resources Enable Opera
Validate on Submit
Validate on Submit 1. Why Validate Join the Discussion Questions? Comments? More of this Feature Submit
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
Using Pre-written JavaScript Scripts
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.
Analog Clock Script
Analog Clock 1. Introduction Basic Help Using Pre-written Scripts More of this Feature The Head Script
Validate and Format Dates
Validate and format dates as your visitor is typing it in with this script attached to the onkeyup event.
JavaScript Encryption
JavaScript Encryption Join the Discussion Questions? Comments? There are a number of things that are
getElementsByTagName
The Javascript DOM 7. getElementsByTagName Join the Discussion Questions? Comments? More of this Feature
Addslashes and Stripslashes
Addslashes and Stripslashes Join the Discussion Questions? Comments? If you are used to programming your
Submit the form only once
Validate on Submit 4. Avoid Multiple Submits Join the Discussion Questions? Comments? More of this Feature
Dynamic Dropdown Three Selects Script
Three Dynamic Dropdowns The Javascript Join the Discussion Questions? Comments? More of This Feature
Last Day of Month
Last Day of the Month Join the Discussion Questions? Comments? There are various times when you are doing
Add Continuous Text Marquee
Continuous Text Marquee 3. Add to Your Page More of this Feature Example Obtain the Script Along with
Formatting Numbers
Formatting Numbers Join the Discussion Questions? Comments? When you are processing numbers with javascript
First Time Only Script
First Time Only 2. Obtain the Script Join the Discussion Questions? Comments? More of this Feature Introduction
removeChild
The Javascript DOM 9. removeChild Join the Discussion Questions? Comments? More of this Feature Introduction
Modal Dialog Box Javascript
Modal Dialog Box Part 2 : Obtain the Script More of this Feature Introduction and Sample Use the Script
Comments
Learn Javascript Comments Join the Discussion Questions? Comments? More of this Tutorial Alert and Confirm
Reserved Words
Reserved Words The following are Reserved Words in Javascript. This list of reserved words includes several
JavaScript Functions
JavaScript has its own unique way of handling where you want parameters to your function to be optional.
Piano Chord Calculator
Piano Chord Calculator 1. Introduction and Sample Basic Help Using Pre-written Scripts More of this Feature
Copyright
Web pages are copyright so don't copy without permission
Object Oriented JavaScript
JavaScript Object Notation is a short way of defining objects. It is so convenient that it is commonly used with Ajax for passing objects from the server.
Where to put User Scripts in Opera
Opera supports user javascripts directly. You just need to tell it where you've put them.
Disable Form Fields
Disable Form Fields Join the Discussion Questions? Comments? Sometimes when you have a form for your
HTML Comments and JavaScript
Why use HTML comments around JavaScript.: internet explorer 2 internet explorer 3 sans serif font livescript javascript language
Cross Browser Ticker/Marquee Script RtoL...
Cross Browser Ticker/Marquee 2a. Obtain the Right to Left Script More of this Feature Introduction LtoR
Numeric Array Sort
Numeric Array Sort Join the Discussion Questions? Comments? Related Resources Ignore Case Sort Random
Limiting Textarea Text Example
Limiting Textarea Text 1. Introduction and Sample Join the Discussion Questions? Comments? More of this
Defining Variables
Learn Javascript Defining Variables Join the Discussion Questions? Comments? More of this Tutorial Getting
What Javascript Can Not Do
There are a few things that the JavaScript programming language does not let you do
The WHILE Loop
Learn Javascript The WHILE Loop Join the Discussion Questions? Comments? More of this Tutorial The FOR
Tools for Making JavaScript
What tools do you need to write JavaScript?
Interpreted or Compiled
JavaScript runs as an interpreted language in the web browser. This impacts on how you need to write your code in ways you wouldn't need to worry about if it were compiled.
Using NOSCRIPT
Learn Javascript Using Noscript Join the Discussion Questions? Comments? More of this Tutorial External
JavaScript Alert
The JavaScript language itself provides very few debugging tools. One of the few that it does provide and perhaps the most useful is alert().
A Brief History of Javascript
What is Javascript, who created it, and who controls the standards?

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