You don't have to pay for JavaScript code, there is always a free version around somewhere

One script that seems to be a popular item for internet marketers to try to sell to other internet marketers is one that will create a hovering "Buy Now" box that stays visible on the screen while the person reads their compelling content that convinces them that they need to buy whatever is being sold. When they decide to buy the button to do so is right there. Well my script here doesn't have quite as many bells and whistles as that script but you can easily modify this script to do everything that theirs can do and more without having to buy anything.

Buy Now Hover Button

There are two methods that all JavaScript objects have.

Every object that you define in JavaScript has at least two methods available - valueOf() and toString(). These methods will return a variable that contains the value of the object or a string equivalent of the object. In most cases these are exactly the same but there are a few object types where they are not.

valueOf and toString

Dynamically update dropdown lists based on other dropdowns using JavaScript

Updating a second dropdown's content based on a user selection in a first dropdown is a common requirement. Of course having figured out how to do that everyone then wants to know how to extend that functionality to update a third dropdown based on the selection in the second one. Here's how to amend the code from my dynamic dropdown script to add a third dropdown. The same principal can of course then be applied in order to add even more dropdowns if required.

Linking Three Dropdowns

JavaScript can control how fast things move on your web page.

Depending on just what it is that you want to have moving around on your web page you may want it moving fast or slow. You may even have several things moving around that you want to have move at different speeds. In the tenth tutorial on animation we look at how you can easily alter the speed at which an object moves using JavaScript.