Tab order is important for proper navigation through a keyboard interface. The keyboard tab order must be coordinated with the structure of the webpage.
An index is a link but an internal link meaning in a Word document you can jump around a document much like you can link in a website from one page to another or even from one section to another section.
Several factors can create barriers for audiences with disabilities, particularly those who are deaf, hard of hearing, blind, severely sight impaired or visually impaired.
