How do you do it!

Hello, I had a quick question, I have looked at the source, and I cant figure out how to do it. I want to use the "acronym feature" For example, "PHP is a widely..." located in the top left side of the page. I looked at the source code and I see that you have the following <acronym title="recursive acronym for PHP: Hypertext Preprocessor">PHP</acronym> I can make the underlined text, and the help pointer with css, but I cant get the title or alt text to appear, How did you do it? Is is something else in CSS or, is it a php script. I would greatly appreciate if you could shed some light on this for me. Thanks -Jacob