This is a balloon style tooltip that can be applied to any link(s) on the page. What sets it apart is where it gets the tooltip messages- from ordinary DIV elements on the page containing the desired tooltip content. This fact means you can easily define ToolTips with rich HTML and images inside them. In other words, any content can now easily become a tooltip message, whether you're manually defining the tooltips, or dynamically generating them using server side languages.
The tooltip supports an optional arrow image that like the tooltip itself, dynamically adjusts itself if it's too close to any four corners of the browser window.