Single row selection and editable grid

I need to process the selected row data and edit the cell values. can i do both the things?. If its
Can u tell me, how to create the grid with editable and must be a single row selection?

Add:
obj.setCellEditable(true);
to:
http://www.activewidgets.com/javascript.forum.13355.8/highlight-row-and-edit-cell.html

If you activate row selection, how would you select which cell to edit?