Introduction to HTML5 Canvas
The canvas element is a webpage container for graphics. You can use JavaScript to draw graphics within the canvas element. Learn how to draw lines, rectangles, circles, and curves, code included. 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 ...
Regular Expression Basics : Match a Set of Characters
A Regular Expression (regex) is a sequence of characters that define a pattern that allows you to search, match, locate, replace, manipulate, and manage text. In this article you'll learn how to use regular expressions to match a set of of characters. More ...
Code to Drag and Drop an Image Anywhere on a Webpage
HTML5's drag-and-drop standard is designed to let you drag text or data from a textbox or table cell, to another textbox or table cell. But what if you want to drag an image, not to a target element, but to anywhere on a webpage. Then HTML5 drag-and-drop falls short. More ...
Object-Oriented JavaScript
Once listed as nice to have, these days knowledge of JavaScript is a deciding factor when it comes to hiring web developers. This book treats JavaScript as a serious object-oriented language, showing you how to build robust, maintainable, and powerful libraries and applications. Read this book if you want to be able to take your JavaScript skills to a new level of sophistication. 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 ...
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 ...
Slide Show with Different Size Images
In this article, I explain how to code a slide show that can display different size images without growing and shrinking your web page. I'll explain it in detail so that you can understand and feel comfortable using the code, then you can cut and paste the code into your webpage and modify it for your purposes. More ...
Prototype Keyword Gives JavaScript Object Oriented Inheritance
The way JavaScript supports inheritance is not like true object oriented languages like C+. In JavaScript, the prototype keyword allows an object to inherit the properties and methods of another object. More ...
Regular Expressions Boundaries
In this article you learn how to controls where a regular expression matches a string, on a word or non-word boundary, at the beginning or end of a string. You also learned about multiline mode. More ...
Easy JavaScript Web Storage Code
In the past allowing web pages to store data on your PC was considered too dangerous. Cookies can not be considered permanent and reliable storage. HTML5 brings us web storage, providing methods to store keyword/value data pairs in the user's browser. More ...
Password Protection Using the Frames Method
One method of password protecting your webpages is to use a cookie, but cookies are unreliable. If you can't trust a cookie to store the information that the user is logged in, where can you store it? In this example I'll show you how to use frames for JavaScript password security. More ...
