Sometimes, when we made web pages, we need to explain title, subject or word. How to do this ? OK, mostly, we use tooltips to do this.

with jQuery, tooltips makd so easy. use the plugin.
you don’t need write much javascript. you just know how to use it.

ok, I find some tooltips, easy and cool.

• announcing-beautytips-jquery-tooltip-plugin - soooo good. example here.
• jTips - still cool
• cluetip-plugin-beta -  always cool. example here
• and more……

Smashing magasine collect many tips effect, use css or javascript. tooltips-scripts-ajax-javascript-css-dhtml/ go to take a look, find what you want.

good luck.