Correct Answer: Event: Change Selection Type: item Item(s) : P1_ITEM

True Action: Execute Javascript Code:

if ($v("P1_CONDION_ITEM") == 1) {
    $("label[for=P1_ITEM] ").text("Sale Amt");
} else if ($v("P1_CONDION_ITEM") == 2) {
    $("label[for=P1_ITEM]").text("Credit Amt");
}