Header Hints

Is there a way to have a small popup "hint" appear when the user mouses over the column headers? We often have to use abbreviations in the columns headers for lack of horizontal space, and it would be nice to be able to give a full name and description for each header when teh user mouses over it.

Why not making the cell content a <a href="#" title="your hint text">Text</a>?
It works for me.
Diabolik

You can use tooltips...

in your case :
myTooltips = ["A","B","C"]
obj.setHeaderTooltip(myTooltips);

but you can also use :

obj.setFooterTooltip(myTooltips);
obj.setCellTooltip(myTooltips);