Reveal the text like a pop up

Reveal is lightweight .js file 1.75KB and easy to implement.
It is cross-browser compatible with modern browsers (with some graceful degradation of course).
You can use Reveal to show any when you click on it.

Read more and see demo at the website:
http://www.zurb.com/playground/reveal-modal-plugin

Another option to hide text and reveal in the page here:
This demo uses jQuery.
http://nurroy.com/nur-js/hiding-text.htm