Is that possible to allow user to change vlue inside the cell

This tool look really great, but if i want to allow user to interact with the content, what could be donne ?

Out of the box - no, standard control is read-only. But it can be extended to allow editing:

http://www.activewidgets.com/javascript.forum.1394.34/textbox-template-edit-on-double.html

There are several examples in this forum with different implementations.

Thank you