Style Sheets and Table Headers

*"stylesheets:* Can have header cells more prominently styled for easy 
recognition when there is a difference between the elements used for 
header and data cells."

This is not a very important consideration.  Most authors do the 
reverse, they style "td" cells to look like headers when they are not.  
When an author has "th" cells they are usually careful to style them 
differently.

The problem with partial sight, which is the same as with screen 
reading, is that you don't have to go very deep into a table before the 
table headers disappear.  Associating table headers with table cells is 
not easy with screen magnifiers.  It would be neat to have associated 
"th" contents pop up on hover or focus.

Anyway, in the large print world special table headers are useful for 
about five rows in.

Wayne