Here is an accessibility validator:-
http://www.miislita.com/searchito/ac...validator.html
Test your web page at intervals as you construct it.
The main items are:-
to allow a viewer to enlarge text without the text overlapping other text or images
to add alt descriptions to images so that a viewer knows what it shows if he can't see it properly
leave plenty of space in input boxes
make sure that font color is very different from background-color
There are plenty more items to consider, read the items in the above link.
More advice here:-
http://www.w3.org/WAI/
http://www.w3.org/TR/WCAG10-TECHS/
Code downloaded to my PC will be deleted in due course.
WIN7; IE9, Firefox, Opera, Chrome and Safari for Windows; screen resolution usually 1366*768.
Also IE6 on W98 with 800*600 and IE8 on Vista 1440*900.