Controlling descriptions and repetition

Designers and developers can assign descriptions for the animations, images, and graphics in a SWF file. Provide names for graphics so the screen reader can interpret them. If a graphic or animation does not communicate vital information to the SWF file (perhaps it is decorative or repetitive), or you outlined the element in the overall SWF file description, do not provide a separate description for that element. Providing unnecessary descriptions can be confusing to users who use screen readers.

If you have several nested movie clips that serve a single purpose or convey one idea, ensure that you do the following:

• Group these elements in your SWF file.

• Provide a description for the parent movie clip.

• Make all the child movie clips inaccessible.

  This is extremely important, or the screen reader tries to describe all the irrelevant nested movie clips, which will confuse the user, and might cause the user to leave your website. Make this decision whenever you have more than one object, such as many movie clips, in a SWF file. If the overall message is best conveyed using a single description, provide a description on one of the objects, and make all the other objects inaccessible to the screen reader.

  Looping SWF files and applications cause screen readers to constantly refresh because the screen reader detects new content on the page. Because the reader thinks the content is updated, it returns to the top of the web page and starts rereading the content. Make inaccessible to screen readers any looping or refreshing objects that do not have to be reread.

  Note: Do not type a description in the Description field of the Accessibility panel for instances (such as text) that the screen reader reads aloud.