- From: Wendy A Chisholm <chisholm@trace.wisc.edu>
- Date: Mon, 24 May 1999 16:22:58 -0500
- To: Ian Jacobs <ij@w3.org>, w3c-wai-gl@w3.org
- Cc: w3c-wai-ua@w3.org
Flicker and other visual events that may cause a seizure (such as quick changes from light to dark) may be created by the following 4 ways (there may be more): 1. scripting 2. animated images 3. applets 4. embedded multimedia objects possible suggestions for UA: 1. allow users to disable scripting, applets, and multimedia objects 2. allow the user to control the rate of change (of scripts, applets, and multimedia objects). 3. allows users to pause animated images (i.e. only show first or last frame, or step through frames at user request) --w At 01:49 PM 5/24/99 , Ian Jacobs wrote: >Hello, > >We say in checkpoint 7.1 of the Web Content Accessibility Guidelines >[1]: > > Until user agents allow users to control flickering, > avoid causing the screen to flicker. > >I'd like to tell the UA WG how flicker may be caused so >that UAs can prevent it. Can someone explain what markup >or settings lead to flicker? > >Thank you, > > - Ian > >[1] http://www.w3.org/TR/WAI-WEBCONTENT/#gl-movement > >-- >Ian Jacobs (jacobs@w3.org) http://www.w3.org/People/Jacobs >Telephone May 1999 only: (212) 688-4489 >Cell phone May 1999: (917) 450-8783 >Otherwise Tel/Fax: (212) 684-1814 >
Received on Monday, 24 May 1999 17:26:02 UTC