HTML 508 Checklist

• Document file name does not contain spaces or special characters.

• Document file name should be concise, generally be limited to 20-30 characters, but make the content of the file clear in the context in which it is presented.

• If frames are used, each frame includes a title that describes the frame’s purpose or content.

• Documents are readable without an associated style sheet.

• All images and/or non-text elements have alternative text descriptions:

  • Alt tags should be limited in length
  • Longer descriptions should use the longdesc tag.
  • Images used only for decoration or spacing have null alt tags (alt=””).
  
  

• All charts and graphs have either an alternative text description or provide a description in the text immediately below the chart/graph. Descriptions in the text must be referenced in the alt tag.

• Image maps use appropriate alternative text and are rendered on the user-side.

• Color is not used to convey important information, e.g., "See red text below."

• Color contrast is sufficient and color combinations used are distinguishable to those with color-blindness.

• Data tables identify row and column headers.

• Data cells in tables are associated with row and column headers.

• Graphics, animations, movies, or other objects avoid strobing, flickering, or flashing effects.

• Scripts include text and keyboard access, and the Web page functions properly when the scripts are disabled. (Examples: images used in navigation scripts have alt tags and “onClick” commands are accompanied by “onkeypress.”)

• When electronic forms are designed to be completed online:

  • Use the LABEL and ID elements when form controls are text input fields.
  • Make dynamic HTML scripting keyboard accessible.
  • Use Title attributes.
  • Include special instructions within FIELD labels.
  • Create form fields in logical tab order.
  • Render buttons in HTML rather than as images.
  
  

• A Skip Navigation link is provided with any repetitive navigation.

• The user has control over the timing of content changes.

• Font size is under user control.

• All linked files are 508-compliant or a second link to an equivalent alternative HTML or text-only version is provided.

• A link to a download is provided for all viewers, players, and plug-ins. (Example: Adobe Acrobat Reader, Windows Media Player, PowerPoint.)

• File format and size of non-HTML linked files are provided.

• A text-only version is provided when there is no other way to make the content accessible. (Example: A flow chart must have a text equivalent.)