The CODE is javascript, HTML, and CSS.
The javascript consists of two variables: w4rHome, a boolean, to check if the script is on my page (true) or yours (undefined); and w4r, an object, in which are the methods that allow reader interaction.
The HTML and CSS are prepended with "w4ri-" for id attributes and "w4rc-" for class attributes.
Hopefully the above will prevent collisions with other scripts and elements on your page.