HTML5 Canvas Storing and Clearing Transformations
With HTML5 Canvas, it's possible to save the current transformation, do some drawing and transforming, and then restore the old transformation. More ...
Prevent Automated Form Submissions With Java Script
Spammers have robots that search the Web for such forms and when they find one, they use automated programs to submit thousands of spam. Webmasters have developed a method to prevent such abuse. In this article, I show you three different examples of using Java Script to implement this method for your own web form. More ...
JavaScript Code to Add or Remove Specific Elements of an Array
Arrays are very useful in programming because they can be used like a data base. In this article you learn JavaScript with code examples to add or remove specific elements of an array. More ...
Java Script Math Object Trigonometric Methods
This article describes the Java Script Math object .sin, .cos, and .tan methods along with how to convert degrees to radians and how to set the number of digits to the right of the decimal point. More ...
A Brief Introduction to HTML for JavaScript Programmers
Although JavaScript is a neat programming language, the basic foundation of the web is HTML. JavaScript gives you the ability to control and modify the HTML. More ...
Four Ways to Use Java Script Event Handlers
Almost everything on a webpage is an "object". Almost all objects can respond to an event. You can control what an object does in response to an event by creating an event handler. In this article, you'll learn four different ways to connect an event handler to an event. More ...
Calculators for Your Website : Decimal to Hexidecimal Converter
It's not easy for most people to convert between decimal and hexadecimal in their head. In this article, I will provide you with Java Script code for a Decimal to Hexidecimal / Hexidecimal to Decimal Converter. More ...
Java Script to Get Selected Item from Select List Option Group
Since you may have identically named items in multiple optgroups, you need to a way to get the name of the optgroup as well as the name of the option. The code in this article shows you how. More ...
Put Commas in Your Java Script Calculators
Writing large numbers with the digits in groups of three make the numbers easier to read. In this article you'll learn how to code calculator applications that will accept the entry of numbers with commas, and return results with commas. More ...
HTML5 Canvas lineCap and lineJoin Attributes
The HTML5 canvas element is a webpage container for graphics. You can use JavaScript to draw within the canvas element. In this article to learn how to draw lines with round or square end caps and how to specify that where two lines join the joint should be miter, round or beveled. More ...
Creating Basic Java Script Functions
In this article you learn how to create basic Java Script functions. You learn how to use parameters and how to return values, including how to return an array from a function. The article also intoduces variable scope. More ...
Java Script Code for a Random Circle Generator
Have you seen some Web content that uses a group of several different size and color circles as a decoration? In this article I'll show you how to use a bit of Java Script code to draw a group of random size and color circles. More ...
