Text-only browsers have different ways of interpreting tables. The only way to make sure text-only browsers will display your content properly is to view your website in one and find out. Tables that convey statistical data or other organized information are available in a linear fashion. If tables are used to position graphics, make sure the ALT text doesn't wrap. This causes multiple columns of text, which confuses screen-readers.
Frames Try to avoid using frames.
Audio, Video and Multimedia All audio and video information, if important, have an associated transcript. If audio or video information contains verbal content, provide a link to a transcript of that content. If the audio or video information is just for decoration, then a transcript is not necessary. Use HTML instead of content that requires plug-ins whenever possible. Plug-ins, which add functionality to browsers such as Netscape and Internet Explorer, must often be downloaded and installed before a user can view your content.