setsensible(datefrom,dateto) with grid (Urgent)

i need to add setsensible to the grid for the second calendar column ('ed,calendar,calendar)

to not let the user choose a date less then datefrom

thank you

can be done as

grid.attachEvent(“onEditCell”,function(stage, id ,ind){
if (stage == 1){ //occurs when edit operation started and calendar rendered
if (ind == FROM_INDEX) grid._grid_calendarA.setSensitive(null, grid.cells(id,TO_INDEX).getValue());
if (ind == TO_INDEX) grid._grid_calendarA.setSensitive(grid.cells(id,FROM_INDEX).getValue(),null);

return true;