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Guideline 9:
Design for device-independence.

Use features that enable activation of page elements via a variety of input devices.

Device-independent access means that the user may interact with the user agent or document with a preferred input (or output) device -- mouse, keyboard, voice, head wand, or other. If, for example, a form control can only be activated with a mouse or other pointing device, someone who is using the page without sight, with voice input, or with a keyboard or who is using some other non-pointing input device will not be able to use the form.

Checkpoints

9.1Provide client-side image maps instead of server-side image maps except where the regions cannot be defined with an available geometric shape. [Priority: 1]
9.2Ensure that any element that has its own interface can be operated in a device-independent manner. [Priority: 2]
9.3For scripts, specify logical event handlers rather than device-dependent event handlers. [Priority: 2]
9.4Create a logical tab order through links, form controls, and objects. [Priority: 3]
  • For example, in HTML, specify tab order via the "tabindex" attribute or ensure a logical page design.
9.5Provide keyboard shortcuts to important links (including those in client-side image maps), form controls, and groups of form controls. [Priority: 3]
  • For example, in HTML, specify shortcuts via the "accesskey" attribute.