Tooltips
Making use of the title tag within a tags or the alt tag can be a great benefit to the user experience, but what if you want to provide more than a few words of a tip, maybe even an image. Netflix has made this method popular. Now a jQuery plugin makes it easy for you to add to your sites.
Simply adding some additional information to the user is so simple. Let's say you're talking about global warming and want to give an example story. You can continue this for as many tooltips as you'd like. Like this one about the supercomputing grand challenge. These tips are set to "close" after the user has moused out of the tip area. This allows them to first get in the tip to click on links or select and copy text.
A new version of jTip (will be clueTip) is in the works. Check out the demo at Learning jQuery.