This is the famous tipsy plugin with persistent behavior. Now the tip wont go when clicked. Also you can dynamically set the content of tip-box (no need to provide it via title). Additionally a custom event which fires whenever you open the tip, so you can write some AJAX work in that and set the content dynamically.
About Tipsy: tipsy is a simple jQuery plugin for generating Facebook-style tooltips.
It's used by Twitter, Github, Slideshare and Bitbucket, amongst others.
http://onehackoranother.com/projects/jquery/tipsy
Hosted at GitHub; browse at:
http://github.com/jaz303/tipsy/tree/master
Or clone from:
git://github.com/jaz303/tipsy.git
This works exactly as tipsy. The additional options include: {persistent: true} this will make the tipsy persistent and it wont go on mouse-out.