Techniques for Technique 3.5.5

3.5.5 View navigation

User agents that render frames need to provide device independent mechanisms
for the user to move the application focus between the frames in the document. 
For current graphical user interfaces like Microsoft Windows, Apple Macintosh
and X-Windows this means native support for using the pointer and keyboard to
move the focus.  Opera 3.60 and Microsoft Internet Explorer 5.0 for MS-Windows
provide both keyboard and pointer support to move the application focus between
frame elements. 

The following image shows Opera rendering a frame set.  The “3” key can be used
to move the application focus between frames in Opera 3.60.

*** insert image: finance-frame-opera.gif ***
ALT: Image of Opera rendering a set of 5 frames

The following image shows Microsoft rendering a frame set.  

*** insert image: finance-frame-explorer.gif ***
ALT: Image of Explorer rendering a set of 5 frames

Two keyboard commands are available to move between frames in Internet Explorer
5.0:
1.      Move forward between frames CTRL+TAB 
2.      Move back between frames SHIFT+CTRL+TAB

Where the two differ is that Internet Explorer provides additional programmatic
information to assistive technologies to allow them to be notified that the
focus has changed.  Therefore assistive technologies like screen readers can
use that information to notify the user of changes in focus.

Jon Gunderson, Ph.D., ATP
Coordinator of Assistive Communication and Information Technology
Chair, W3C WAI User Agent Working Group
Division of Rehabilitation - Education Services
University of Illinois at Urbana/Champaign
1207 S. Oak Street
Champaign, IL 61820

Voice: 217-244-5870
Fax: 217-333-0248
E-mail: jongund@uiuc.edu
WWW:	http://www.staff.uiuc.edu/~jongund
		http://www.w3.org/wai/ua
		http://www.als.uiuc.edu/InfoTechAccess