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JavaScript: Most Popular Articles

These articles are the most popular over the last month.
Final Javascript Quiz
Learn Javascript Final Javascript Quiz Tutorials Object Oriented Javascript Defining Classes Putting
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
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
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
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.
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
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.
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
Radio Button Validation
Radio Button Validation The setup and validation of radio buttons appears to be the form field that gives
Ajax
When should you use asynchronous Ajax calls and when should you use synchronous.
Dynamic Dropdown Two Selects
Dynamic Dropdowns Based on Another Dropdown Join the Discussion Questions? Comments? More of This Feature
document.write
document.write Join the Discussion Questions? Comments? A lot of people, particularly those first starting
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
The IF Statement
Learn Javascript The IF Statement Join the Discussion Questions? Comments? More of this Tutorial The
Last Modified Date
Last Modified Date Join the Discussion Questions? Comments? Are you wondering just how current the information
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.
JavaScript 101
Want to use JavaScript on your web pages? There are several alternatives.
Hello World
Learn JavaScript Hello World Join the Discussion Questions? Comments? More of this Tutorial Getting Started
Hex to Decimal and Decimal to Hex
Hex to Decimal and Decimal to Hex Join the Discussion Questions? Comments? A number of computer related
Deleting Cookies
Deleting Cookies Join the Discussion Questions? Comments? More About Cookies Writing Cookies Reading
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
Recursive Calls in JavaScript
There are two ways of setting up recursive function calls in JavaScript
JavaScript By Example
The ternary operator provides a shorter way of writing some JavaScript if statements as this example demonstrates.
External Javascripts
Learn Javascript External Javascripts Join the Discussion Questions? Comments? More of this Tutorial
Strings to Numbers
How to convert text strings to numbers in JavaScript.
Modal Dialog Box
Modal Dialog Box Part 1 : Introduction and Sample Page Basic Help Using Pre-written Scripts More of this
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
JavaScript Execution Order
What order does JavaScript run its code in?
Drop Down List Validation
Drop Down List Validation Join the Discussion Questions? Comments? Validation of dropdown lists is fairly
\$ 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.
Adding Javascript from Javascript
Adding Javascript from Javascript Join the Discussion Questions? Comments? One thing that Javascript
Obtaining Your Visitor's IP Address
Obtaining Your Visitor's IP Address Join the Discussion Questions? Comments? JavaScript itself has no
Positioning the Popup Window
Changing the size of the popup window.: sans serif font left position popup windows desired position body background
Back Button
Back Button or Link Join the Discussion Questions? Comments? So you would like to put a link on your
Thumbnail Image Popups
Popup Windows 8. Thumbnail Image Popups Join the Discussion Questions? Comments? More of this Feature
Passing Parameters Via Query Strings ...
Passing Parameters Via Query Strings 1. Write Querystrings Join the Discussion Questions? Comments? More
Defining Classes
Learn Javascript Defining Classes Join the Discussion Questions? Comments? More of this Tutorial Object
Calendar Generator
Create the HTML code for a calendar to add to your page
Returning Multiple Values
Returning Multiple Values Join the Discussion Questions? Comments? You can pass multiple values to a
No Right Click Script
No Right Click Script Join the Discussion Questions? Comments? Related Resources View Source Bookmarklet
Continuous Text Marquee Code
Continuous Text Marquee 2. Obtain the Script More of this Feature Example Add to Your Page The first
Hiding Your Email Address
Hiding Your Email Address Join the Discussion Questions? Comments? Related Resources Email Address Validation
Week of Year Date Method
Week of Year Adding to the Date Object Join the Discussion Questions? Comments? Related Resources Day
Multiple Choice Quiz Script Sample
Multiple Choice Example Quiz Basic Help Using Pre-written Scripts Create Your Own Quiz Question/Answer
Event Listeners
The Javascript DOM 19. Event Listeners 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
Creating a Combo Box
Site Navigation 7. Combo Box Join the Discussion Questions? Comments? More of this Feature Introduction
Equals, Equals Equals, or Equals Equals Equals
Using one, two or three equals signs in Javascript depending on what you need to achieve
Using Modal Dialog Box Javascript
Modal Dialog Box Part 3 : Use the Script More of this Feature Introduction and Sample Obtain the Script
The CASE Statement
Learn Javascript The CASE Statement Join the Discussion Questions? Comments? More of this Tutorial The
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.
Multiple Personality Quiz
Multiple Personality Quiz 1. Quiz Head Script Join the Discussion Questions? Comments? More of this Feature
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.
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
The Javascript Tooltip
This is a Javascript Tooltip Please visit my site Extended Tooltip 1. Introduction and Sample Basic Help
Function to Read Parameters Passed Via Q...
Passing Parameters Via Query Strings 2. The Read Function Join the Discussion Questions? Comments? More
Array Maximum and Minimum Values
Array Maximum and Minimum Values Join the Discussion Questions? Comments? One of the advantages to JavaScript
Alert and Confirm
Learn Javascript Alert and Confirm Join the Discussion Questions? Comments? More of this Tutorial Comments
Basic Popup Windows
Popup Windows 1. Basic Popup Windows Join the Discussion Questions? Comments? With HTML you can open
JavaScript Date Selection Correcting Days in...
Date Selection Correct Days in Month Dropdown List One way of having your visitors enter a date into
innerHTML
The Javascript DOM 6. innerHTML Join the Discussion Questions? Comments? More of this Feature Introduction
Password Generator
Password Generator Join the Discussion Questions? Comments? Tutorials How it Works For maximum security
JavaScript and HTML
JavaScript and HTML Join the Discussion Questions? Comments? There are four different ways to attach
Sample Quiz
Javascript Quiz 10 Set Questions Join the Discussion Questions? Comments? Get this Script Quiz Body Script
getElementsByClassName
The Javascript DOM 8. getElementsByClassName Join the Discussion Questions? Comments? More of this Feature
Why JavaScript
How should you use JavaScript so that it enhances your site.
First Time Only
First Time Only 1. Introduction and Sample Join the Discussion Questions? Comments? More of this Feature
Head Scripts and Body Scripts
Head Scripts and Body Scripts Join the Discussion Questions? Comments? You don't need to be able to write
Disable No Right Click Scripts
Disable No Right Click Scripts Join the Discussion Questions? Comments? Related Resources View Source
SetInterval
JavaScript Glossary definition for: SetInterval
Alternatives to eval
Alternatives to "eval" Join the Discussion Questions? Comments? One Javascript command that gets used
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
Counting Words
Counting Words Basic Help Using Pre-written Scripts Have you ever thought that it would be useful to
Block Exit Blockers User Script
Block Exit Blockers User Script Join the Discussion Questions? Comments? Related Resources Enable Opera
Getting Started
Introduction to a series of tutorials on programming with JavaScript
Day of Year Date Method
Day of Year Adding to the Date Object Join the Discussion Questions? Comments? Related Resources Week
Daylight Saving Time
Daylight Saving Time Adding Methods to the Date Object One flag missing from the information that the
Sample Hangman
Hangman Sample Game with Images More of this Feature The Body Script Alternate Body The Head Script The
Script Index
Script Index Join the Discussion Questions? Comments? I have now added so many scripts to this site that
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.
Window Close
Window Close Join the Discussion Questions? Comments? In my series of articles on popup windows I go
Mouse Cursor Position
Mouse Cursor Position Join the Discussion Questions? Comments? Until recently there was no standard way
Print Directly to Printer
An explanation of some of the reasons why Javascript can't print a page without the print dialog popping up.
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
Add Continuous Text Marquee
Continuous Text Marquee 3. Add to Your Page More of this Feature Example Obtain the Script Along with
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.
Adding Days to a Date
Adding Days to a Date Join the Discussion Questions? Comments? Adding or subtracting a number of days
Random Array Sort
Random Array Sort Join the Discussion Questions? Comments? Related Resources Numeric Sort Ignore Case
What Version of Javascript
What Version of Javascript Join the Discussion Questions? Comments? Glossary Javascript ECMAscript Javascript
Common Javascript Errors
Commonly made Javascript errors and how to find them
Javascript Format and Colour
Javascript Formatter Related Articles Javascript Compressor Does your Javascript code look a mess? Are
Collapsible Menu HTML
Collapsible Menu 4. Adding Menus Join the Discussion Questions? Comments? More of this Feature Introduction
JavaScript and JScript : What's the Difference?
JavaScript and JScript, different languages for different browsers.
getElementsByTagName
The Javascript DOM 7. getElementsByTagName Join the Discussion Questions? Comments? More of this Feature
JavaScript Encryption
JavaScript Encryption Join the Discussion Questions? Comments? There are a number of things that are
JavaScript and Unicode
JavaScript can work with unicode as well as ASCII.
++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.
Convert to Roman Numerals
Convert to Roman Numerals Join the Discussion Questions? Comments? Elsewhere on About What are Roman
hasOwnProperty
JavaScript Glossary definition for: hasOwnProperty
Validate on Submit
Validate on Submit 1. Why Validate Join the Discussion Questions? Comments? More of this Feature Submit
Submit the form only once
Validate on Submit 4. Avoid Multiple Submits Join the Discussion Questions? Comments? More of this Feature
A Brief History of Javascript
What is Javascript, who created it, and who controls the standards?
JavaScript and Emails
Why not to use JavaScript with emails? Well there are some good reasons why JavaScript and Emails don't go together.
Disable Form Fields
Disable Form Fields Join the Discussion Questions? Comments? Sometimes when you have a form for your
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
Hide Until Page Finishes Loading
Web Page Animation 2. Hide Until Page Loaded Join the Discussion Questions? Comments? More of this Feature
First Time Only Script
First Time Only 2. Obtain the Script Join the Discussion Questions? Comments? More of this Feature Introduction
The WHILE Loop
Learn Javascript The WHILE Loop Join the Discussion Questions? Comments? More of this Tutorial The FOR
What Javascript Can Not Do
There are a few things that the JavaScript programming language does not let you do
Built-in Functions: alert, confirm, prompt
JavaScript provides built in functions to display dialog boxes
Follow the Mouse Sample
Follow the Mouse 1. Introduction Basic Help Using Pre-written Scripts More of this Feature Obtain the
Disabling the Default Action
How to bypass the default action when you have alternate Javascript processing to replace it.
Last Day of Month
Last Day of the Month Join the Discussion Questions? Comments? There are various times when you are doing
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.
Modal Dialog Box Javascript
Modal Dialog Box Part 2 : Obtain the Script More of this Feature Introduction and Sample Use the Script
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.
Where to put User Scripts in Opera
Opera supports user javascripts directly. You just need to tell it where you've put them.
Calendar Popup Script
Calendar Popups 1. The Calendar Script Join the Discussion Questions? Comments? More of this Feature
Timed Window Close
Setting your pupup window to automatically close after a set time.
Comments
Learn Javascript Comments Join the Discussion Questions? Comments? More of this Tutorial Alert and Confirm
Analog Clock Script
Analog Clock 1. Introduction Basic Help Using Pre-written Scripts More of this Feature The Head Script
Using NOSCRIPT
Learn Javascript Using Noscript Join the Discussion Questions? Comments? More of this Tutorial External
Disable JavaScript User Script
Disable JavaScript User Script Related Resources Enable Opera Userscripts The correct way to use JavaScript
Cross Browser Ticker/Marquee Script RtoL...
Cross Browser Ticker/Marquee 2a. Obtain the Right to Left Script More of this Feature Introduction LtoR
Copy and Paste
Copy and Paste Join the Discussion Questions? Comments? To be able to incorporate pre-built Javascripts
Reserved Words
Reserved Words The following are Reserved Words in Javascript. This list of reserved words includes several
Formatting Numbers
Formatting Numbers Join the Discussion Questions? Comments? When you are processing numbers with javascript
Dynamic Dropdown Three Selects Script
Three Dynamic Dropdowns The Javascript Join the Discussion Questions? Comments? More of This Feature
Limiting Textarea Text Example
Limiting Textarea Text 1. Introduction and Sample Join the Discussion Questions? Comments? More of this
JavaScript Functions
JavaScript has its own unique way of handling where you want parameters to your function to be optional.
The JavaScript Modulo Bug
The modulo operator in JavaScript does not return the correct value for negative numbers.
Five Most Common Coding Errors
The five worst pieces of code that people use with Javascript and which you ought to avoid. Page 4.
Making it Move
This is a web page object. move Web Page Animation 7. Making it Move Join the Discussion Questions? Comments?
Defining Variables
Learn Javascript Defining Variables Join the Discussion Questions? Comments? More of this Tutorial Getting
Quiz Maker 1 Body Script
Quiz Maker 1 Script 1. Quiz Body Script Join the Discussion Questions? Comments? More of this Feature
HTML in Javascript
HTML to Javascript Converter Join the Discussion Questions? Comments? To ensure that any HTML that you

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