Tooltip alike content display in each grid cell

Hi,
Is there any easy way to display grid cell full content as a tooltip when the mouse move-over? I need to display the data in grid; certain columns have both very long and short contents. It is not practical that just increases the column's width. So I wonder if the tooltip alike feature available?

Thanks,
Allan

This code should do it -

obj.setCellTooltip(function(c,r){return this.getCellText(c,r)});

Alex,
It works!
Thanks,
Allan