Use JavaScript parseInt() and parseFloat() to Convert Strings to Numbers
If the results of a mathematical operation in your script are not what you expected, make sure that you convert any numbers represented as strings to the actual number data type before performing the operation. More ...
Learn JavaScript Visually
People think JavaScript is hard when trying it out for the first time. This book is for Visual Learners. One page of this visual JavaScript guide can equal one chapter of a conventional book as illustrations can make a world of difference over strictly words on a page. More ...
Easy JavaScript Form Design
A form is an html element that allows users to enter information. To experiment with forms in JavaScript, replace the method and action attributes in the form opening tag with onSubmit='javascript return false;'
to prevent the form from being submitted to the server. More ...
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 Graph Generating Code
If you want to display a graph on your web page, you could use a graphics program to draw the graph, but that's time consuming and the resulting graph is static, it can't change or grow. In this article I will show you how to generate graphs using JavaScript. 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 ...
Easy Rollovers
A rollover is when a user moves the mouse pointer over an image on a Web page the image is replaced with a new image. The simplest rollover can be created with the html code provided in this article. More ...
Debugging JavaScript : Coercions
JavaScript is not a tightly typed language. Sometimes this comes in handy, but other times it can cause problems. 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 ...
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 Form Validation
You can use forms on your website to get information from the visitor. However a user might make an error, or forget and entry in a form. Ignorant and malicious users may deliberately enter trash into your form in an effort to break your application. 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 ...
