An XHTML file that is well-formed but not valid: although the markup is structurally correct, some elements have a tabindex although they are not allowed to have that attribute. It is not clear how assistive technology is supposed to respond to this. Possibly, the illegal tabindex values will become part of the tab sequence for all elements with tabindex. Validity error: illegal tabindex attributes Christophe.Strobbe@esat.kuleuven.be en Copyright BenToWeb 2004-2007 2005-10-05 accepted for end user evaluation Strictly Conforming Documents

This test case is intended to fail because some attributes are illegal. Testing may show that these illegal attributes do not cause problems.

 enduser

The following test page is the home page of a fictitious web store. It contains navigation lists, a search form and some content (a welcome message). You don't need to follow the links or find something with the form.

Please navigate through the page with the tab key. When tabbing through the page, do you get to the welcome message?

If not, what happened?

 10 30 blindness

The page is not valid, but this does not necessarily cause accessibility problems.

Depending on the browser, the user can tab to the welcome message (for example with Internet Explorer 6) or tab past it (for example with Mozilla 1.7.3).