Revealing content on hover

Hello

Lets say I have a div.


<div id=box>
THIS IS MY CONTENT
</div>

How can I hide the contents of the div, and reveal it on hover?

Here are all 5 ways to do it. In my examples I was hiding the span. Just change it to a div instead and no need for the parent with position relative. http://www.visibilityinherit.com/code/tooltip.php

Hi, I love you.