Round a Float to 4 Digits to the Right of the Decimal Point
On the typical PC, Java Script Math object methods can return floating point numbers with up to 16 digits to the right of the decimal point. For most purposes, this kind of accuracy is not required, nor desired, and that many digits causes nothing but confusion. In this article, You'll learn how to round a floating point number to 4 digits to the right of the decimal point. More ...
Easy Java Script Butterfly Animation
You'll be surprised at how little code it requires and how easy it is to use Java Script along with CSS to create an animation. In this article, I show you how to create a simple butterfly animation. More ...
Easy Slide Show Code
One of the problems with creating such a slide show is that the images should all be the same size. If the images are not all the same size, your web page may grow and shrink as the different images
are displayed. More ...
Code for Java Script Cube / Box Volume Calculator
In this article I'll show you how to use to Java Script to create a Cube / Box Volume calculator. With this calculator, the user inputs the side dimension of a cube or the height, width and length of a box, and the calculator will return the volume. I'll explain everything in detail so that you can learn Java Script and modify the code for your own purposes. More ...
Introduction to JavaScript Programming
JavaScript is a wonderful little programming language. It's a client-side, meaning it runs right on your local computer, not on the web server, and it's a scripting language meaning
it's run by an interpreter. More ...
Easy Moving Popup Code
You have probably come across a webpage where a small window appears at the side of the webpage and drifts to the center of the webpage. They are commonly used to present you with a form where you can enter your email address to subscribe to a newsletter. In this article I give you the code to create this type of moving popup window. 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 ...
Java Script Code to Calculate Speed / Distance of Falling Object
In this article you learn how to use Java Script to perform gravity calculations, elapsed time, distance traveled, instantaneous velocity, how to use the onchange event, how to use radio buttons, and much more. More ...
Concatenating a String and Another Data Type
To concatinate a string and a number, use the styring concatination operator. This is because JavaScript converts the number to a string. To use the + operator with a number, or numbers that are in string data type requires using parseInt() or parseFloat() to convert the strings to numbers. 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 Java Script Timer Code
Sometimes you need something to happen after a delay, or you need something to occur repeatedly. This can be accomplished using Java Script timers. My objective in this article is to give you the timer code without surrounding it with a lot of confusing peripheral code so you can quickly use it for your own purposes. More ...
Let Your Web site Visitors Set Font Size
In this article, you'll learn that it requires only a few lines of Java Script to let the visitors to your Web site control the font size. You'll also learn how to use a cookie to store their preference on their computer. More ...
