Set Date when value changes from another column while in Batch Edit mode

Hello,

     My Grid is in GridEditMode.Batch.  I have two template columns.

      First Template Column uses a RadNumericTextBox
      Second Template Column uses a RadDatePicker.

Could you explain how to update the RadDatePicker's date when the RadNumericTextBox value changes USING the RadNumericTextBox's OnValueChanged CLIENT event please.