When visitors put their cursor on an item you have defined as having a help popup, it will load very quickly because JavaScript is actually creating the entire HTML page for the popup! There are tons of customizations you can play with the tailor the appearance of the popups to your site.
This shows how to have a test run using confirm alerts to have the user enter in TRUE or FALSE for each question. The results are computed and then given (via a popup) to the user.
Tigra Hints is a free JavaScript widget that displays pop-up box with notes (also known as tooltips or hints) when mouse appears over any HTML element on the page. Any HTML is welcome inside the box: lists, tables, images etc.
This file shows a very simple example of how to create a button that does something JavaScript-like in nature when it is clicked. The alert() function is predefined: we could have made our own function and then called it upon the onClick event.