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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.
Final Javascript Quiz
Learn Javascript Final Javascript Quiz Tutorials Object Oriented Javascript Defining Classes Putting
What is JavaScript Used For?
Just where does JavaScript fit into the overall picture when it comes to building web pages correctly.
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.
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
Referring Site
Referring Site Join the Discussion Questions? Comments? The above line (if there is one) contains the
Analysis Quiz
Analysis Quiz 1. Quiz Head Script Basic Help Using Pre-written Scripts More of this Feature Quiz Body
Using window.onload
Using window.onload Join the Discussion Questions? Comments? Some scripts require that you run something
Should You Have 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.
Bulletin Board / Forum Code Converter ...
Bulletin Board / Forum Code Converter Join the Discussion Questions? Comments? At some stage you will
Modal Windows
Modal Windows Join the Discussion Questions? Comments? Related Resources Modal Dialog Box Creating a
Dynamic Dropdown Two Selects
Dynamic Dropdowns Based on Another Dropdown Join the Discussion Questions? Comments? More of This Feature
Adding Validation to the Submit Button ...
Validate on Submit 2. Submit Button Join the Discussion Questions? Comments? More of this Feature Why
Dynamic Dropdown Three Selects
Three Dynamic Dropdowns Sample and HTML Join the Discussion Questions? Comments? More of This Feature
Print Button
Print Button Join the Discussion Questions? Comments? You can easily add a print button or link to your
Deleting Cookies
Deleting Cookies Join the Discussion Questions? Comments? More About Cookies Writing Cookies Reading
Obtaining Your Visitor's IP Address
Obtaining Your Visitor's IP Address Join the Discussion Questions? Comments? JavaScript itself has no
Hex to Decimal and Decimal to Hex
Hex to Decimal and Decimal to Hex Join the Discussion Questions? Comments? A number of computer related
Everything you Need to Know About Ajax...
When should you use asynchronous Ajax calls and when should you use synchronous.
Hello World
Learn JavaScript Hello World Join the Discussion Questions? Comments? More of this Tutorial Getting Started
A Simple Guide to Using "Ternary" Operators in...
The ternary operator provides a shorter way of writing some JavaScript if statements as this example demonstrates.
Last Modified Date
Last Modified Date Join the Discussion Questions? Comments? Are you wondering just how current the information
JavaScript Making Decisions
You can nest one IF statement inside another using JavaScript.
Radio Button Validation
Radio Button Validation The setup and validation of radio buttons appears to be the form field that gives
Why JavaScript
How should you use JavaScript so that it enhances your site.
Where to put User Scripts in Opera
Opera supports user javascripts directly. You just need to tell it where you've put them.
Understanding What Order to Run JavaScript Code
What order does JavaScript run its code in?
Target Window or Frame
Target Window or Frame Join the Discussion Questions? Comments? With an ordinary HTML link using the
Calendar Generator
Create the HTML code for a calendar to add to your page
\$ 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.
How to Split Webpage JavaScript into Separate...
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.
External Javascripts
Learn Javascript External Javascripts Join the Discussion Questions? Comments? More of this Tutorial
Everything You Need to Learn JavaScript
Want to use JavaScript on your web pages? There are several alternatives.
Week of Year Date Method
Week of Year Adding to the Date Object Join the Discussion Questions? Comments? Related Resources Day
JavaScript and JScript : What's the Difference?
JavaScript and JScript, different languages for different browsers.
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
Function to Read Parameters Passed Via Q...
Passing Parameters Via Query Strings 2. The Read Function Join the Discussion Questions? Comments? More
No Right Click Script
No Right Click Script Join the Discussion Questions? Comments? Related Resources View Source Bookmarklet
Drop Down List Validation
Drop Down List Validation Join the Discussion Questions? Comments? Validation of dropdown lists is fairly
Javascript and XHTML
Javascript and XHTML Join the Discussion Questions? Comments? With HTML pages on the web you can just
Sample Hangman
Hangman Sample Game with Images More of this Feature The Body Script Alternate Body The Head Script The
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.
Block Exit Blockers User Script
Block Exit Blockers User Script Join the Discussion Questions? Comments? Related Resources Enable Opera
document.write
document.write Join the Discussion Questions? Comments? A lot of people, particularly those first starting
Passing Parameters Via Query Strings ...
Passing Parameters Via Query Strings 1. Write Querystrings Join the Discussion Questions? Comments? More
How to Use 'GET' and 'POST' for Server Requests...
When should you use GET and when should you use POST with Ajax.
The IF Statement
Learn Javascript The IF Statement Join the Discussion Questions? Comments? More of this Tutorial The
Quiz Script Generator
Multiple Choice Quiz Maker 1. Question/Answer Script Basic Help Using Pre-written Scripts More of this
Random Array Sort
Random Array Sort Join the Discussion Questions? Comments? Related Resources Numeric Sort Ignore Case
Positioning the Popup Window
Changing the size of the popup window.: sans serif font left position popup windows desired position body background
Modal Dialog Box
Modal Dialog Box Part 1 : Introduction and Sample Page Basic Help Using Pre-written Scripts More of this
Countdown Timer
Countdown Timer 1. Introduction and Sample Basic Help Using Pre-written Scripts More of this Feature
Multiple Choice Quiz Script Sample
Multiple Choice Example Quiz Basic Help Using Pre-written Scripts Create Your Own Quiz Question/Answer
Adding Days to a Date
Adding Days to a Date Join the Discussion Questions? Comments? Adding or subtracting a number of days
Google Maps - Satellite Images
Google Maps Satellite Images More of this Tutorial Get an API Adding a Map Zooming In and Out Latitude
Recursive Calls in JavaScript
There are two ways of setting up recursive function calls in JavaScript
Strings to Numbers
How to convert text strings to numbers in JavaScript.
JavaScript By Example
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.
How to Write a Session Cookie in Javascript
Web browsers distinguish between three different types of cookies. These types are session cookies, first party cookies, and third party cookies.
Adding Javascript from Javascript
Adding Javascript from Javascript Join the Discussion Questions? Comments? One thing that Javascript
Passing Parameters
Learn Javascript Passing Parameters Join the Discussion Questions? Comments? More of this Tutorial Functions
A Brief History of Javascript
What is Javascript, who created it, and who controls the standards?
Variables, Functions, Properties and Methods
While these four terms have distinct meanings in some languages, things are not as clear cut in JavaScript.
What Version of Javascript
What Version of Javascript Join the Discussion Questions? Comments? Glossary Javascript ECMAscript Javascript
Disable No Right Click Scripts
Disable No Right Click Scripts Join the Discussion Questions? Comments? Related Resources View Source
Password Generator
Password Generator Join the Discussion Questions? Comments? Tutorials How it Works For maximum security
Alternatives to eval
Alternatives to "eval" Join the Discussion Questions? Comments? One Javascript command that gets used
How to Identify and Fix Common Javascript Errors
Commonly made Javascript errors and how to find them
Returning Multiple Values
Returning Multiple Values Join the Discussion Questions? Comments? You can pass multiple values to a
Numeric Array Sort
Numeric Array Sort Join the Discussion Questions? Comments? Related Resources Ignore Case Sort Random
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
Daylight Saving Time
Daylight Saving Time Adding Methods to the Date Object One flag missing from the information that the
Day of Year Date Method
Day of Year Adding to the Date Object Join the Discussion Questions? Comments? Related Resources Week
Using Increment and Decrement Operators in...
For those new to programming the difference between ++i and i++ is not obvious. Here's a simple example to explain the difference.
Continuous Text Marquee Code
Continuous Text Marquee 2. Obtain the Script More of this Feature Example Add to Your Page The first
Array Maximum and Minimum Values
Array Maximum and Minimum Values Join the Discussion Questions? Comments? One of the advantages to JavaScript
Concentration Memory Game with Images Sa...
Concentration Memory Game With Images 1. Introduction and Sample More of this Feature Head Script Body
First Time Only
First Time Only 1. Introduction and Sample Join the Discussion Questions? Comments? More of this Feature
Here's What JavaScript CAN'T Do
There are a few things that the JavaScript programming language does not let you do
Window Close
Window Close Join the Discussion Questions? Comments? In my series of articles on popup windows I go
The JavaScript Modulo Bug
The modulo operator in JavaScript does not return the correct value for negative numbers.
JavaScript Library or Code Yourself
Should you use a JavaScript library or write all the code yourself. Both ways have advantages and disadvantages.
Reserved Words
Reserved Words The following are Reserved Words in Javascript. This list of reserved words includes several
The CASE Statement
Learn Javascript The CASE Statement Join the Discussion Questions? Comments? More of this Tutorial The
Why You Shouldn't Use JavaScript in Emails
Why not to use JavaScript with emails? Well there are some good reasons why JavaScript and Emails don't go together.
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
A Quick Guide to Using Child Nodes in Java
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.
Disable JavaScript User Script
Disable JavaScript User Script Related Resources Enable Opera Userscripts The correct way to use JavaScript
Multiple Personality Quiz
Multiple Personality Quiz 1. Quiz Head Script Join the Discussion Questions? Comments? More of this Feature
Piano Chord Calculator
Piano Chord Calculator 1. Introduction and Sample Basic Help Using Pre-written Scripts More of this Feature
Submitting after validation
Validate on Submit 3. Submit If Valid Join the Discussion Questions? Comments? More of this Feature Why
Writing Cookies
Writing Cookies Join the Discussion Questions? Comments? More About Cookies Reading Cookies Deleting
Page Events
Learn Javascript Page Events Join the Discussion Questions? Comments? More of this Tutorial Form Events
Back Button
Back Button or Link Join the Discussion Questions? Comments? So you would like to put a link on your
Converting IP Addresses
Convert easily betweeen IP address formats with JavaScript.
Hiding Your Email Address
Hiding Your Email Address Join the Discussion Questions? Comments? Related Resources Email Address Validation
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
Mouse Cursor Position
Mouse Cursor Position Join the Discussion Questions? Comments? Until recently there was no standard way
JavaScript By Example: 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).
Print Directly to Printer
An explanation of some of the reasons why Javascript can't print a page without the print dialog popping up.
Add Continuous Text Marquee
Continuous Text Marquee 3. Add to Your Page More of this Feature Example Obtain the Script Along with
Addslashes and Stripslashes
Addslashes and Stripslashes Join the Discussion Questions? Comments? If you are used to programming your
Cross Browser Ticker/Marquee Example
Cross Browser Ticker/Marquee 1. Introduction and Sample Basic Help Using Pre-written Scripts More of
JavaScript Date Selection Correcting Days in...
Date Selection Correct Days in Month Dropdown List One way of having your visitors enter a date into
Counting Words
Counting Words Basic Help Using Pre-written Scripts Have you ever thought that it would be useful to
Falling Snow Script
Falling Snow 2. Obtain the Script Join the Discussion Questions? Comments? More of this Feature Introduction
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.
Using Modal Dialog Box Javascript
Modal Dialog Box Part 3 : Use the Script More of this Feature Introduction and Sample Obtain the Script
setTimeout or setInterval
setTimeout or setInterval Join the Discussion Questions? Comments? Glossary setTimeout setInterval The
JavaScript and HTML
JavaScript and HTML Join the Discussion Questions? Comments? There are four different ways to attach
Validate on Submit
Validate on Submit 1. Why Validate Join the Discussion Questions? Comments? More of this Feature Submit
Creating a Combo Box
Site Navigation 7. Combo Box Join the Discussion Questions? Comments? More of this Feature Introduction
Copying Objects in Javascript
There is more than one way of copying objects in JavaScript depending on just exactly how you intend using the copy.
innerHTML
The Javascript DOM 6. innerHTML Join the Discussion Questions? Comments? More of this Feature Introduction
Basic Popup Windows
Popup Windows 1. Basic Popup Windows Join the Discussion Questions? Comments? With HTML you can open
Modern Combo Boxes
HTML doesn't have a tag to produce a combo box but we can use JavaScript to create our own.
Long
JavaScript Glossary definition for: Long
Collapsible Menu HTML
Collapsible Menu 4. Adding Menus Join the Discussion Questions? Comments? More of this Feature Introduction
Javascript Format and Colour
Javascript Formatter Related Articles Javascript Compressor Does your Javascript code look a mess? Are
First Time Only Script
First Time Only 2. Obtain the Script Join the Discussion Questions? Comments? More of this Feature Introduction
Using NOSCRIPT
Learn Javascript Using Noscript Join the Discussion Questions? Comments? More of this Tutorial External
Browser Detection
Browser Detection Join the Discussion Questions? Comments? One rather interesting statistic that you
responseText and responseXML
Introduction to Ajax 8. responseText and responseXML Join the Discussion Questions? Comments? More of
Getting Started
Introduction to a series of tutorials on programming with JavaScript
JavaScript Testing
There are a number of different types of error that can occur with your JavaScript. Some types of error are easier to detect than others.
Falling Snow Sample
Falling Snow 1. Introduction and Sample Basic Help Using Pre-written Scripts More of this Feature Obtain
Polymorphic JavaScript Functions
JavaScript provides the ultimate in polymorphic functions as a function can rewrite itself completely.
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.
Add Falling Snow
Falling Snow 3. Add to Your Page Join the Discussion Questions? Comments? More of this Feature Introduction
What 'Interpreted' and 'Compiled' Means in Java
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.
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
Learn JavaScript Basics (Objects, Functions,...
A series of example JavaScript that shows you how to write JavaScript.
Submit the form only once
Validate on Submit 4. Avoid Multiple Submits Join the Discussion Questions? Comments? More of this Feature
Equals, Equals Equals, or Equals Equals Equals
Using one, two or three equals signs in Javascript depending on what you need to achieve
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.
Image Protection
Image Protection Join the Discussion Questions? Comments? More of this Feature How to Use this Form Using
Concentration Memory Game Sample
Concentration Memory Game 1. Introduction and Sample Basic Help Using Pre-written Scripts More of this
Tools for Making JavaScript
What tools do you need to write JavaScript?
Event Listeners
The Javascript DOM 19. Event Listeners Join the Discussion Questions? Comments? More of this Feature
Credit Card Validation
Validate credit card numbers in forms with this Javascript routine for validating the length and check digits.
Follow the Mouse Sample
Follow the Mouse 1. Introduction Basic Help Using Pre-written Scripts More of this Feature Obtain the
Defining Classes
Learn Javascript Defining Classes Join the Discussion Questions? Comments? More of this Tutorial Object
Making it Move
This is a web page object. move Web Page Animation 7. Making it Move Join the Discussion Questions? Comments?
HTML in Javascript
HTML to Javascript Converter Join the Discussion Questions? Comments? To ensure that any HTML that you
How to Use Optional Parameter Functions in...
JavaScript has its own unique way of handling where you want parameters to your function to be optional.

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