Basic State Machines
A State Machine is a program, logic circuit, or mechanical device, that has a finite number of legal states. For example a traffic control signal can be red, yellow, or green. It can't be red and green. It can't be violet. 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 ...
Calculators for Your Website : Fahrenheit to Celsius Converter
In this article, I provide you with Java Script code for a Decimal to Fahrenheit to Celsius / Celsius to Fahrenheit Converter. I'll explain the code in detail so that you can have confidence modifying it for use on your website. More ...
Easy Code to Add Mouse Trails to Your Webpage
Mouse trails cause the mouse pointer to be followed by a trail of small images when the user moves it. This makes it easier for the user to locate the mouse pointer on the screen. In this article, I give you Java Script code that will cause mouse trails on your webpage. More ...
Easy HTML5 Drag and Drop
In this example I show you how to use HTML5 drag-and-drop to make a nice little application that could be used to teach children which classification different animals belong in. This example includes only the minimal code for the application to work. More ...
How to Use HTML5 canvas arc and arcTo Functions
This article describes how to draw arcs using the canvas arc and arcTo functions with example code and an explanation of radians. More ...
Easy Animated Banners with Java Script
In this article, I will show you how to use Java Script to create an animated banner. Using Java Script allows you to edit or replace images in the animation sequence, and change the amount of time each image is displayed without doing any recompiling. More ...
HTML5 Canvas JavaScript Code to a Draw Bezier Curve
The HTML5 canvas element allows you to, when you don't need an extremely complex image, not require your webpage to load an image file, but instead to use JavaScript to the draw the graphics on your webpage. More ...
Using the Java Script Date Object
When you want to work with a date in Java Script, you need to use the Date object. In this article, you learn how to create a Date object for today, or for any date in the past or future. You learn how to find the difference between two dates, and how to format a date string any way that you desire. You also learn how to validate a date string returned from a text box in a form, which involved an introduction to JavaScript regular expressions. More ...
JavaScript Code to Make Image Wave Like a Flag
This article provides JavaScript code and instruction to make an image wave like a flag. More ...
Easy JavaScript Picture Selector Code
Suppose you want to create a digital photo album to display a group of pictures, but you don't want the page to be too large. One solution would be to display only one full size picture, and the other pictures as small thumbnail images. More ...
Regular Expressions Intervals
Regular expression intervals tell us about the number of occurrences of a character in a string. Curly braces are used to define a precise count of how many occurrences you are checking for. More ...
