function ChangeCardType(val, elementID)
{
    var cardType = document.getElementById(elementID);
    if (val.toString().charAt(0) == "4") cardType.value = "1";
    else if (val.toString().charAt(0) == "5") cardType.value = "2";
    else if (val.toString().charAt(0) == "6") cardType.value = "4";
    else cardType.value = "";
}