This curriculum makes extensive use of HTML 4.0 and CSS 1.0 techniques, but as of February 2000:
- few browsers fully support HTML 4.0 (although more do with each new release),
- there are still significant differences between browsers in their support for and rendering of Cascading Style Sheets (CSS) 1.0,
- few browsers fully support CSS 2.0.
Since a major goal of this curriculum is to show authors the benefits of using the new techniques:
- some examples have been simulated using current techniques that attempt to show what a future browser will display, and
- some examples that use HTML 4.0 and CSS 1.0 are only known to display properly on a few browsers (e.g. - and this list is not exhaustive - Microsoft Internet Explorer 4.01 or later or Netscape Navigator 4.0, Opera 3.51 (with optional plug-ins)).
In some cases the browser you are using will not support the particular markup we have used to illustrate an example. In those instances, we have made an attempt to ensure that what you will see (or hear) will still make sense in context and explain what is supposed to be happening.
The most important thing to remember is that Web browsing tools and assistive technology are constantly evolving. We hope the "next" release of every tool will support more accessibility features and W3C recommendations than the current release.
Next section is: Your basic curriculum toolkit.