I've seen this affect used on some FAQs and would like to know how to do it.

There is a list of questions:

What is a dog?
How often should I feed a dog?
Do does smell?

You click on a question and the answer appears below:

What is a dog?
How often should I feed a dog?
Every day or sometimes even more!
Do does smell?

They rest of the text moves down to accommodate the newly visible text.

Does anyone know how this is done? Got a link to a tutorial?

Thanks

It requires some javascript. You might want to check out jQuery, easy to use and lots of examples and 'plugins' for it.

If you have the latest Dreamweaver, there is a spry function that can do it as well.

Thanks, Spry did it for me.

And Spry is ... JAVASCRIPT !