PDF Files Include a link to download the Access plug-in next to any link to download the Adobe Acrobat reader. Provide alternative mechanisms for each script and applet that performs an important function, other than presentation of information. If an applet requires user interaction that cannot be duplicated in an alternative format, make the applet directly accessible. Provide a mechanism for the user to freeze all moving or blinking objects, particularly those that contain text. Ensure pages are readable and usable without style sheets for browsers that do not support them or users who deactivate them.
Nest headings properly.
Use style sheets rather than HTML attributes to control spacing or to force layout. Audio and Movie Clips Provide a text transcript next to the anchor for the sound. Use captions or other visual representation for information in the sound track. Provide text description of video information. Non-standard HTML very often causes problems for screen readers.