SC 2.2.1 - User warning for timeout script example

Hi,

I've added code to the example provided in the 'Providing a script on page that warns the user a timeout is about to expire'. Please check it.

Regards,
Sofia


[1] http://trace.wisc.edu/wcag_wiki/index.php?title=Providing_a_script_on_page_that_warns_the_user_a_timeout_is_about_to_expire