Regular Expression Position Matching
In this article you how to use regular expressions to match characters at the beginning, end, both beginning and end, or at any specified location in a string. More ...
HTML5 Canvas Drag-and-Drop
The HTML5 canvas element creates a sketchpad area on a webpage where you can use JavaScript to draw 2D shapes, graphics, animations, render bitmap images, and even create online presentations and build dynamic browser games. In this article you'll learn how to use drag-and-drop in your canvas projects. More ...
Calculate The Points of an Equilateral Triangle
Starting an equilateral triangle is easy, you just draw a line. However, drawing the third point to create an exact equilateral triangle requires a bit of calculation. More ...
Calculators For Your Web Site
If you have a Web site where your visitor would find an online calculator very handy, with a little Java Script code you can easily provide a custom calculator right on your Web page. 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 ...
How to Disable the Browser Back Button
Let's assume that you have a legitimate reason for disabling the back button. Maybe you need to restrain the user within a multi-page form. In this article, I show you how to disable the browser's Back button with a only few lines of Java Script code. More ...
Change the Case of a Character in a String
A common task with JavaScript is to change the case of the first letter in a string, or of an internal letter, or even change the case of an entire string. More ...
Debugging JavaScript : Coercions
JavaScript is not a tightly typed language. Sometimes this comes in handy, but other times it can cause problems. More ...
Java Script to Dynamically Add, Remove, and Change Items in a Select List
This article shows you how to use Java Script to add, remove, and change items in a select list. More ...
Calculators for Your Web Site : Body Mass Index
If you have a Web site related to health or dieting, or you just want to provide more useful features on your Web site, you can provide a BMI calculator. This article shows you how to code a Java Script BMI calculator for your Web site. 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 ...
