效果不错的冒泡式提示信息框特效

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<ul id="bubblemenu">
        <li>
            Penn Jillett
            <div>
               My favorite thing about the Internet is that you get to go into the private world of real creeps without having to smell them. 
            </div>
        </li>
        <li>
            Thomas Watson
            <div>
                I think there is a world market for maybe five computers.
            </div>
        </li>
        <li>
             Bill Gates
            <div>
               640K ought to be enough for anybody. 
            </div>
        </li>
        <li>
            Sam Ewing 
            <div>
               Computers are like bikinis. They save people a lot of guesswork.
            </div>
        </li>
    </ul>