TABLE Using id/headers, axis and speak-header

This example is taken from CSS2, Section 17: Tables. It has been modified so as to test:

1. the id/header binding defined in HTML 4.01
2. use of the axis attribute;
3. the aural style property speak-headers, which, in this document, is set to always, so that the header is spoken before every associated cell. The only other value for speak-headers is once, which is intended to cause the audio renderer to speak the header a single time, before reading the pertinent series of cells.)
4. the ability of User Agents and/or assistive technology to recognize the :before pseudo-element which should cause a dollar sign ($) to be generated before each TD so defined;