updateItem

updates the data item with new properties

void updateItem(number|string id,object data);

id	number\|string	the item ID
data	object	the object with properties

var id = dtable.getSelectedId(); 
var item = dtable.getItem(id.row);
item[id.column] = "some_new_value";
 
dtable.updateItem(id.row, item);