Description box on hover - overlay box - cool javascript trick

I found a library that does a cool trick. It shows a description box when you hover a link.

Example:

website design blog - a nice blog indeed


It could be used to make pages, from php applications, with a lot of information, more compact and user friendly. The library is from here: http://www.bosrup.com/web/overlib/ but the page seems to no longer work.

All you have to do is include the js file overlib.js, add a div anywhere in your page like this <DIV id=overDiv
style="Z-INDEX: 1000; VISIBILITY: hidden; POSITION: absolute"></DIV> , and play with the parameters.

Usually it's even prettier then this, but i think the css gets mixed up with my theme css.