what do you mean by setting focus?
Why can't you use first attribute of the dataTable?
Using first attribute of datatable might be a solution, but I was thinking in keeping the order of the table and after clicking the "add row" button jump to the last row of it, without bothering to wich page of the datascroller it belongs. I'll try to figure out something using "first", thanx Ilya!.
Use the footer for focusing