CofC Web Accessibility Guidelines- Rule (L)

(l) When pages utilize scripting languages to display content, or to create interface elements, the information provided by the script shall be identified with functional text that can be read by assistive technology.

Some background: A script is a program that runs in a web page. You normally don't see the script itself, just its effects. Scripts are very common and are used to perform a wide variety of tasks.

The text to invoke a script is embedded in the HTML code for the page. An alternative browserreads this text along with everything else. This is not a problem by itself, but there needs to be some clue as to what the script does. A simple fix is to add some markup to indicate the script's function.

See http://www.access-board.gov/sec508/guide/1194.22.htm#(l) for more detail and some examples.