This is the hidden text that was revealed when the header was clicked. Such hidden text is generally related to the main header which opens them. You can add any number of collapsible headers. Clicking on the header when the text is seen hides the text. Additionally if a header is clicked it will automatically close any open text related to any other header while opening its own hidden text.

This script works with all the newer versions of browsers like IE5+, NS6, Opera and Firefox.
This script does not work with older browsers like NSv4.x but degrades very well.

This is one of the most compact scripts of this nature that you can find in any JavaScript archives.