Tooltipster is a lightweight (4,813 bytes minified) jQuery plugin that enables you to easily create clean, HTML5 validated tooltips.

Supports HTML tags inside the tooltip
Lightweight and degradable
Extremely flexible & fast to set up
Easily styled with 100% CSS - no images needed
Plays nicely with IE
Developed by Caleb Jacob in 23 hours with 2 bag of Fritos and 7 cups of water. Feel free to use and abuse (or improve)!

In this tutorial we are going to write a simple jQuery tooltip plugin. It is going to convert the title attributes of elements withing your page, into a series of colorful tooltips. Six color themes are available, so you can easily match it with the rest of your design.

Because is very useful and powerful, it is considered as a standard approach to design modern web-applications.Using Ajax you can develop interactive solutions for lightboxes, form validation, search, tooltips, navigation and tables. Always keep in mind its drawback in terms of usability and accessibility. Extensive Ajax means that you can easily confuse your visitors giving them to much control and features.