/*var Cards = new makeArray(3);
Cards[0] = new CardType("MasterCard", "51,52,53,54,55", "16");
var MasterCard = Cards[0];
Cards[1] = new CardType("Visa", "4", "13,16");
var Visa = 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]; 
var LuhnCheckSum = Cards[2] = new CardType();*/


function ValidCreditCard(form)
{
	var error = false;
	var today = new Date();
	var expirymonth = null;
	var expiryyear = null;
	var cardtype = document.getElementById('cardtype').value;
	var cardno = document.getElementById('cardno').value;
	var expirydate = document.getElementById('expdate').value;
	error = CheckEmptyCardNumber(cardno);
	if(error)
		return false;
	error = CheckExpDate(expirydate)
	if(error)
		return false;
	else
		return true;
}

function CheckEmptyCardNumber(cardno)
{
	if(cardno.length == 0)
	{
		return true;
	}
	else
	{
		if(isNaN(cardno))
		{
			return true;
		}
		else
		{
			if(cardno.length != 16)
			{
				return true;
			}
			else
			{
				return false;
			}
		}
	}
}

function CheckCVVValid(cardcvv)
{
	if(cardcvv.length == 0)
	{
		return true;
	}
	else
	{
		if(isNaN(cardcvv))
		{
			return true;
		}
		else
		{
			if(cardcvv.length != 3)
			{
				error=true;
			}
			else
			{
				return false;
			}
		}
	}
}

function CheckExpDate(expirydate)
{
	if(expirydate.length == 0)
	{
		return true;
	}
	else
	{
		return false;
	}
}






































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;
 
if(month>12)
 
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;
}
function checkSSN(ssn) 
{
var sSSN = ssn.value;
sSSN = sSSN .replace(/-/,'')
if ((sSSN.length < 10) || (sSSN.length > 10)) 
{
return false;
}
var iLast = sSSN.slice((sSSN.length - 1))
if (iLast != 8 && iLast != 9 && iLast != 10) 
{
return false;
}
re = /\D+/;
var isNum = re.test(sSSN);
if (isNum == true)
{
return false;
}
var arrDig1 = new Array(10)
var arrDig2 = new Array(8)
var iSum = 0;
for (var i = 0; i < 10; i++) 
{
arrDig1[i] = sSSN.slice(i,i+1);
}
arrDig2[0] = arrDig1[0] * 3;
arrDig2[1] = arrDig1[1] * 2;
arrDig2[2] = arrDig1[2] * 7;
arrDig2[3] = arrDig1[3] * 6;
arrDig2[4] = arrDig1[4] * 5;
arrDig2[5] = arrDig1[5] * 4;
arrDig2[6] = arrDig1[6] * 3;
arrDig2[7] = arrDig1[7] * 2;
for (var i = 0; i < 8; i++) 
{
var iDig = parseInt(arrDig2[i]);
iSum = iSum + iDig;
}
var iLeft = iSum % 11;
var iVart = 11 - iLeft;
if ((iVart == 11) || (iVart == 10)) 
{
iVart = 0;
}
if (iVart != arrDig1[8]) 
{
return false;
}
return true;
}