You also need to replace "x_MySourceField" and "x_MyTargetField" by the real ids of your fields. If you are not sure, inspect HTML Element. Make sure you understand before you modify. Compare your code with the example carefully.
You also need to replace "x_MySourceField" and "x_MyTargetField" by the real ids of your fields. If you are not sure, inspect HTML Element. Make sure you understand before you modify. Compare your code with the example carefully.