How to make content of a (cck) field visible when pressing a button? I am working on a Drupal 7 website and I would like to create a node where a specific (cck) text field is only shown to the users after they press a button.

The effect I would like to achieve is exactly the same you can find in the Careers 2.0 website where, at the end of each job post, there is a button titled "Find out how to apply". When you click on this button the "how to apply instructions are shown". To see how it works you can check http://careers.stackoverflow.com/jobs/10860/foursquare-software-engineer-scala-lift-foursquare?campaign=Featured.

Can somebody please help?

Thank you so much!
The best way to do this is in the theme. Simply add the CSS and JS needed for this effect. Should be pretty simple as all fields has unique ids.