<!-- 
var ccmoveon = "No";
var Cards = new makeArray(8);
Cards[0] = new CardType("MasterCard", "51,52,53,54,55", "16");
var MasterCard = Cards[0];
Cards[1] = new CardType("VisaCard", "4", "13,16");
var VisaCard = Cards[1];
Cards[2] = new CardType("AmExCard", "34,37", "15");
var AmExCard = Cards[2];
Cards[3] = new CardType("DinersClubCard", "30,36,38", "14");
var DinersClubCard = Cards[3];
Cards[4] = new CardType("DiscoverCard", "6011", "16");
var DiscoverCard = Cards[4];
Cards[5] = new CardType("enRouteCard", "2014,2149", "15");
var enRouteCard = Cards[5];
Cards[6] = new CardType("JCBCard", "3088,3096,3112,3158,3337,3528", "16");
var JCBCard = Cards[6];
var LuhnCheckSum = Cards[7] = new CardType();
function CheckCardNumber(form)
{
	var tmpyear;
	var alertmsg = "";
	if (form.Card_Type.value.length == 0)
	{
		alertmsg += "Please select the card type.\n";
		form.Card_Type.focus();
	}
	if (form.Card_Num.value.length == 0)
	{
		alertmsg += "Please enter a Card Number.\n";
		form.Card_Num.focus();
	}
	if (form.Exp_Month.value.length == 0) 
	{
		alertmsg += "Please enter the Expiration Month.\n";
		form.Exp_Month.focus();
	}
	if (form.Exp_Year.value.length == 0) 
	{
		alertmsg += "Please enter the Expiration Year.\n";
		form.Exp_Year.focus();
	}
	if (form.Card_Cvv.value.length == 0) 
	{
		alertmsg += "Please enter the CVV Code.\n";
		form.Card_Cvv.focus();
	}
	tmpmonth = form.Exp_Month.value;
	tmpyear = "20" + form.Exp_Year.value;
	if (!(new CardType()).isExpiryDate(tmpyear, tmpmonth)) 
	{
		alertmsg += "This card has already expired.\n";
	}
	card = form.Card_Type.options[form.Card_Type.selectedIndex].value;
	if (card == "VISA") card = "VisaCard";
	if (card == "Mastercard") card = "MasterCard";
	var retval = false;
	if (alertmsg == "")
	{
		var retval = eval(card + ".checkCardNumber(\"" + form.Card_Num.value + "\", " + tmpyear + ", " + tmpmonth + ");");
	}
	cardname = "";
	if (retval)
	{
		// Card OK continue with submit
		ccmoveon="Yes";
	}
	else
	{
		for (var n = 0; n < Cards.size; n++) 
		{
			if (Cards[n].checkCardNumber(form.Card_Num.value, tmpyear, tmpmonth)) 
			{
				cardname = Cards[n].getCardType();
				break;
			}
		}
		if (cardname.length > 0) 
		{
			alertmsg += "This looks like a " + cardname + " number, not a " + card + " number.\n";
		}
		else
		{
			alertmsg += "This card number is not valid.\n";
		}
	alert(alertmsg);
	}
}

function CardType() {
var n;
var argv = CardType.arguments;
var argc = CardType.arguments.length;
this.objname = "object CardType";
var tmpcardtype = (argc > 0) ? argv[0] : "CardObject";
var tmprules = (argc > 1) ? argv[1] : "0,1,2,3,4,5,6,7,8,9";
var tmplen = (argc > 2) ? argv[2] : "13,14,15,16,19";
this.setCardNumber = setCardNumber;
this.setCardType = setCardType;
this.setLen = setLen;
this.setRules = setRules;
this.setExpiryDate = setExpiryDate;
this.setCardType(tmpcardtype);
this.setLen(tmplen);
this.setRules(tmprules);
if (argc > 4)
this.setExpiryDate(argv[3], argv[4]);
this.checkCardNumber = checkCardNumber;
this.getExpiryDate = getExpiryDate;
this.getCardType = getCardType;
this.isCardNumber = isCardNumber;
this.isExpiryDate = isExpiryDate;
this.luhnCheck = luhnCheck;
return this;
}
function checkCardNumber() {
var argv = checkCardNumber.arguments;
var argc = checkCardNumber.arguments.length;
var cardnumber = (argc > 0) ? argv[0] : this.cardnumber;
var year = (argc > 1) ? argv[1] : this.year;
var month = (argc > 2) ? argv[2] : this.month;
this.setCardNumber(cardnumber);
this.setExpiryDate(year, month);
if (!this.isCardNumber())
return false;
if (!this.isExpiryDate())
return false;
return true;
}
function getCardType() {
return this.cardtype;
}
function getExpiryDate() {
return this.month + "/" + this.year;
}
function isCardNumber() {
var argv = isCardNumber.arguments;
var argc = isCardNumber.arguments.length;
var cardnumber = (argc > 0) ? argv[0] : this.cardnumber;
if (!this.luhnCheck())
return false;
for (var n = 0; n < this.len.size; n++)
if (cardnumber.toString().length == this.len[n]) {
for (var m = 0; m < this.rules.size; m++) {
var headdigit = cardnumber.substring(0, this.rules[m].toString().length);
if (headdigit == this.rules[m])
return true;
}
return false;
}
return false;
}
function isExpiryDate() {
var argv = isExpiryDate.arguments;
var argc = isExpiryDate.arguments.length;
year = argc > 0 ? argv[0] : this.year;
month = argc > 1 ? argv[1] : this.month;
if (!isNum(year+""))
return false;
if (!isNum(month+""))
return false;
today = new Date();
expiry = new Date(year, month);
if (today.getTime() > expiry.getTime())
return false;
else
return true;
}
function isNum(argvalue) {
argvalue = argvalue.toString();
if (argvalue.length == 0)
return false;
for (var n = 0; n < argvalue.length; n++)
if (argvalue.substring(n, n+1) < "0" || argvalue.substring(n, n+1) > "9")
return false;
return true;
}
function luhnCheck() {
var argv = luhnCheck.arguments;
var argc = luhnCheck.arguments.length;
var CardNumber = argc > 0 ? argv[0] : this.cardnumber;
if (! isNum(CardNumber)) {
return false;
  }
var no_digit = CardNumber.length;
var oddoeven = no_digit & 1;
var sum = 0;
for (var count = 0; count < no_digit; count++) {
var digit = parseInt(CardNumber.charAt(count));
if (!((count & 1) ^ oddoeven)) {
digit *= 2;
if (digit > 9)
digit -= 9;
}
sum += digit;
}
if (sum % 10 == 0)
return true;
else
return false;
}
function makeArray(size) {
this.size = size;
return this;
}
function setCardNumber(cardnumber) {
this.cardnumber = cardnumber;
return this;
}
function setCardType(cardtype) {
this.cardtype = cardtype;
return this;
}
function setExpiryDate(year, month) {
this.year = year;
this.month = month;
return this;
}
function setLen(len) {
if (len.length == 0 || len == null)
len = "13,14,15,16,19";
var tmplen = len;
n = 1;
while (tmplen.indexOf(",") != -1) {
tmplen = tmplen.substring(tmplen.indexOf(",") + 1, tmplen.length);
n++;
}
this.len = new makeArray(n);
n = 0;
while (len.indexOf(",") != -1) {
var tmpstr = len.substring(0, len.indexOf(","));
this.len[n] = tmpstr;
len = len.substring(len.indexOf(",") + 1, len.length);
n++;
}
this.len[n] = len;
return this;
}
function setRules(rules) {
if (rules.length == 0 || rules == null)
rules = "0,1,2,3,4,5,6,7,8,9";
var tmprules = rules;
n = 1;
while (tmprules.indexOf(",") != -1) {
tmprules = tmprules.substring(tmprules.indexOf(",") + 1, tmprules.length);
n++;
}
this.rules = new makeArray(n);
n = 0;
while (rules.indexOf(",") != -1) {
var tmpstr = rules.substring(0, rules.indexOf(","));
this.rules[n] = tmpstr;
rules = rules.substring(rules.indexOf(",") + 1, rules.length);
n++;
}
this.rules[n] = rules;
return this;
}
-->