Prevent Automated Form Submissions With Java Script
Spammers have robots that search the Web for such forms and when they find one, they use automated programs to submit thousands of spam. Webmasters have developed a method to prevent such abuse. In this article, I show you three different examples of using Java Script to implement this method for your own web form. More ...
JavaScript to Add and Remove Rows and Cells from a Table
If you need a client-side application where you have a table that you want to enable the user to add and remove rows and cells, this article provides you with JavaScript code to easily accomplish that. More ...
How Far Did the User Scroll?
In this article you learn how to use Java Script to determine how far a user scrolled your webpage before leaving, and how to log this data on the server with an example using ASP. More ...
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 ...
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 ...
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 ...
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 ...
Java Script Code to Re-arrange Items in a Select List
In this article you'll learn how to use Java Script to re-arrange items in a select list. I'll explain the code in detail so that you'll be able to fully understand and modify it for your own use. 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 ...
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 Comparison Operators
A comparison operator compares two values and returns the result "true" or "false". For comparing numeric values the operators perform the same as they do in algebra. For comparing character strings each character in the strings are converted to their ASCII values and then a numeric comparison is made. 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 ...
