// JavaScript library for form field validation
/*  List of Finction
validateZIPCode (theField, emptyOK)
validateYear(theField)
isZIPCode (s)
reformatZIPCode (ZIPString)
** UTILITY FUNCTIONS **
stripCharsInBag (s, bag)
isInteger (s)
*/
var digits = "0123456789";

var lowercaseLetters = "abcdefghijklmnopqrstuvwxyz"

var uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"


var whitespace = " \t\n\r";
var phoneNumberDelimiters = "()- ";
var validUSPhoneChars = digits + phoneNumberDelimiters;

var validWorldPhoneChars = digits + phoneNumberDelimiters + "+";

var SSNDelimiters = "- ";

var validSSNChars = digits + SSNDelimiters;
var digitsInSocialSecurityNumber = 9;
var digitsInUSPhoneNumber = 10;
var ZIPCodeDelimiters = "- ";
var ZIPCodeDelimeter = "-"
var validZIPCodeChars = digits + ZIPCodeDelimiters
var digitsInZIPCode1 = 5
var digitsInZIPCode2 = 9
var creditCardDelimiters = " "
var mPrefix = "You did not enter a value into the "
var mSuffix = " field. This is a required field. Please enter it now."


var sUSLastName = "Last Name"
var sUSFirstName = "First Name"
var sWorldLastName = "Family Name"
var sWorldFirstName = "Given Name"
var sTitle = "Title"
var sCompanyName = "Company Name"
var sUSAddress = "Street Address"
var sWorldAddress = "Address"
var sCity = "City"
var sStateCode = "State Code"
var sWorldState = "State, Province, or Prefecture"
var sCountry = "Country"
var sZIPCode = "ZIP Code"
var sWorldPostalCode = "Postal Code"
var sPhone = "Phone Number"
var sFax = "Fax Number"
var sDateOfBirth = "Date of Birth"
var sExpirationDate = "Expiration Date"
var sEmail = "Email"
var sSSN = "Social Security Number"
var sCreditCardNumber = "Credit Card Number"
var sOtherInfo = "Other Information"

var iStateCode = "This field must be a valid two character U.S. state abbreviation (like CA for California). Please reenter it now."
var iZIPCode = "This field must be a 5 or 9 digit U.S. ZIP Code (like 94043). Please reenter it now."
var iUSPhone = "This field must be a 10 digit U.S. phone number (like 415 555 1212). Please reenter it now."
var iWorldPhone = "This field must be a valid international phone number. Please reenter it now."
var iSSN = "This field must be a 9 digit U.S. social security number (like 123 45 6789). Please reenter it now."
var iEmail = "This field must be a valid email address (like foo@bar.com). Please reenter it now."
var iCreditCard = "This field must be a valid credit card number. Please reenter it now."
var iCreditCardPrefix = "This is not a valid "
var iCreditCardSuffix = " credit card number. (Click the link on this form to see a list of sample numbers.) Please reenter it now."
var iDay = "This field must be a day number between 1 and 31.  Please reenter it now."
var iMonth = "This field must be a month number between 1 and 12.  Please reenter it now."
var iYear = "This field must be a 2 or 4 digit year number.  Please reenter it now."
var iDatePrefix = "The Day, Month, and Year for "
var iDateSuffix = " do not form a valid date.  Please reenter them now."
var iDate = "This field must be a valid date. Please reenter it now."

var iInteger = "This field must be a whole number value. Please reenter it now."
var iPositiveInteger = "This field must be a positive whole number value. Please reenter it now."
var iAlphabetic = "This field must contain only letters. Please reenter it now."
var iNumber = "This field must contain only numeric values. Please reenter it now."

var pEntryPrompt = "Please enter a "
var pStateCode = "2 character code (like CA)."
var pZIPCode = "5 or 9 digit U.S. ZIP Code (like 94043)."
var pUSPhone = "10 digit U.S. phone number (like 415 555 1212)."
var pWorldPhone = "international phone number."
var pSSN = "9 digit U.S. social security number (like 123 45 6789)."
var pEmail = "valid email address (like foo@bar.com)."
var pCreditCard = "valid credit card number."
var pDay = "day number between 1 and 31."
var pMonth = "month number between 1 and 12."
var pYear = "2 or 4 digit year number."

var defaultEmptyOK = false

		
		
function makeArray(n) {
   for (var i = 1; i <= n; i++) {
      this[i] = 0
   }
   return this
}



var daysInMonth = makeArray(12);
daysInMonth[1] = 31;
daysInMonth[2] = 29;   // must programmatically check this
daysInMonth[3] = 31;
daysInMonth[4] = 30;
daysInMonth[5] = 31;
daysInMonth[6] = 30;
daysInMonth[7] = 31;
daysInMonth[8] = 31;
daysInMonth[9] = 30;
daysInMonth[10] = 31;
daysInMonth[11] = 30;
daysInMonth[12] = 31;

var USStateCodeDelimiter = "|";
var USStateCodes = "AL|AK|AS|AZ|AR|CA|CO|CT|DE|DC|FM|FL|GA|GU|HI|ID|IL|IN|IA|KS|KY|LA|ME|MH|MD|MA|MI|MN|MS|MO|MT|NE|NV|NH|NJ|NM|NY|NC|ND|MP|OH|OK|OR|PW|PA|PR|RI|SC|SD|TN|TX|UT|VT|VI|VA|WA|WV|WI|WY|AE|AA|AE|AE|AP"

function isEmpty(s)
{   return ((s == null) || (s.length == 0))
}

function isWhitespace (s)

{   var i;

    if (isEmpty(s)) return true;

    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);

        if (whitespace.indexOf(c) == -1) return false;
    }

    return true;
}

function stripCharsInBag (s, bag)

{   var i;
    var returnString = "";

    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }

    return returnString;
}

function stripCharsNotInBag (s, bag)

{   var i;
    var returnString = "";

    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);
        if (bag.indexOf(c) != -1) returnString += c;
    }

    return returnString;
}

function stripWhitespace (s)

{   return stripCharsInBag (s, whitespace)
}


function charInString (c, s)
{   for (i = 0; i < s.length; i++)
    {   if (s.charAt(i) == c) return true;
    }
    return false
}


function stripInitialWhitespace (s)

{   var i = 0;

    while ((i < s.length) && charInString (s.charAt(i), whitespace))
       i++;

    return s.substring (i, s.length);
}

function isLetter (c)
{   return ( ((c >= "a") && (c <= "z")) || ((c >= "A") && (c <= "Z")) )
}


function isDigit (c)
{   return ((c >= "0") && (c <= "9"))
}


function isLetterOrDigit (c)
{   return (isLetter(c) || isDigit(c))
}




function isInteger (s)

{   var i;

    if (isEmpty(s))
       if (isInteger.arguments.length == 1) return defaultEmptyOK;
       else return (isInteger.arguments[1] == true);


    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);

        if (!isDigit(c)) return false;
    }

    return true;
}


function isSignedInteger (s)

{   if (isEmpty(s))
       if (isSignedInteger.arguments.length == 1) return defaultEmptyOK;
       else return (isSignedInteger.arguments[1] == true);

    else {
        var startPos = 0;
        var secondArg = defaultEmptyOK;

        if (isSignedInteger.arguments.length > 1)
            secondArg = isSignedInteger.arguments[1];

        if ( (s.charAt(0) == "-") || (s.charAt(0) == "+") )
           startPos = 1;
        return (isInteger(s.substring(startPos, s.length), secondArg))
    }
}


function isPositiveInteger (s)
{   var secondArg = defaultEmptyOK;

    if (isPositiveInteger.arguments.length > 1)
        secondArg = isPositiveInteger.arguments[1];

    return (isSignedInteger(s, secondArg)
         && ( (isEmpty(s) && secondArg)  || (parseInt (s) > 0) ) );
}


function isNonnegativeInteger (s)
{   var secondArg = defaultEmptyOK;

    if (isNonnegativeInteger.arguments.length > 1)
        secondArg = isNonnegativeInteger.arguments[1];

    return (isSignedInteger(s, secondArg)
         && ( (isEmpty(s) && secondArg)  || (parseInt (s) >= 0) ) );
}


function isNegativeInteger (s)
{   var secondArg = defaultEmptyOK;

    if (isNegativeInteger.arguments.length > 1)
        secondArg = isNegativeInteger.arguments[1];

    return (isSignedInteger(s, secondArg)
         && ( (isEmpty(s) && secondArg)  || (parseInt (s) < 0) ) );
}


function isNonpositiveInteger (s)
{   var secondArg = defaultEmptyOK;

    if (isNonpositiveInteger.arguments.length > 1)
        secondArg = isNonpositiveInteger.arguments[1];

    return (isSignedInteger(s, secondArg)
         && ( (isEmpty(s) && secondArg)  || (parseInt (s) <= 0) ) );
}


function isFloat (s)

{   var i;
    var seenDecimalPoint = false;

    if (isEmpty(s))
       if (isFloat.arguments.length == 1) return defaultEmptyOK;
       else return (isFloat.arguments[1] == true);

    if (s == ".") return false;

    for (i = 0; i < s.length; i++)
    {
        // Check that current character is number.
        var c = s.charAt(i);

        if ((c == ".") && !seenDecimalPoint) seenDecimalPoint = true;
        else if (!isDigit(c)) return false;
    }

    return true;
}


function isSignedFloat (s)

{   if (isEmpty(s))
       if (isSignedFloat.arguments.length == 1) return defaultEmptyOK;
       else return (isSignedFloat.arguments[1] == true);

    else {
        var startPos = 0;
        var secondArg = defaultEmptyOK;

        if (isSignedFloat.arguments.length > 1)
            secondArg = isSignedFloat.arguments[1];

        // skip leading + or -
        if ( (s.charAt(0) == "-") || (s.charAt(0) == "+") )
           startPos = 1;
        return (isFloat(s.substring(startPos, s.length), secondArg))
    }
}


function isAlphabetic (s)

{   var i;

    if (isEmpty(s))
       if (isAlphabetic.arguments.length == 1) return defaultEmptyOK;
       else return (isAlphabetic.arguments[1] == true);


    for (i = 0; i < s.length; i++)
    {
        // Check that current character is letter.
        var c = s.charAt(i);

        if (!isLetter(c))
        return false;
    }

    // All characters are letters.
    return true;
}

function isAlphanumeric (s)

{   var i;

    if (isEmpty(s))
       if (isAlphanumeric.arguments.length == 1) return defaultEmptyOK;
       else return (isAlphanumeric.arguments[1] == true);

    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);

        if (! (isLetter(c) || isDigit(c) ) )
        return false;
    }

    return true;
}

function reformat (s)

{   var arg;
    var sPos = 0;
    var resultString = "";

    for (var i = 1; i < reformat.arguments.length; i++) {
       arg = reformat.arguments[i];
       if (i % 2 == 1) resultString += arg;
       else {
           resultString += s.substring(sPos, sPos + arg);
           sPos += arg;
       }
    }
    return resultString;
}


function isSSN (s)
{   if (isEmpty(s))
       if (isSSN.arguments.length == 1) return defaultEmptyOK;
       else return (isSSN.arguments[1] == true);
    return (isInteger(s) && s.length == digitsInSocialSecurityNumber)
}


function isUSPhoneNumber (s)
{   if (isEmpty(s))
       if (isUSPhoneNumber.arguments.length == 1) return defaultEmptyOK;
       else return (isUSPhoneNumber.arguments[1] == true);
    return (isInteger(s) && s.length == digitsInUSPhoneNumber)
}


function isInternationalPhoneNumber (s)
{   if (isEmpty(s))
       if (isInternationalPhoneNumber.arguments.length == 1) return defaultEmptyOK;
       else return (isInternationalPhoneNumber.arguments[1] == true);
    return (isPositiveInteger(s))
}

function isZIPCode (s)
{  if (isEmpty(s)) 
       if (isZIPCode.arguments.length == 1) return defaultEmptyOK;
       else return (isZIPCode.arguments[1] == true);
   
   return (isInteger(s) &&
            ((s.length == digitsInZIPCode1) ||
             (s.length == digitsInZIPCode2)));
}


function isPostalCode (s)     
{	
	if (isEmpty(s)) 
	{
		if (isPostalCode.arguments.length == 1) 
		{
			return defaultEmptyOK;
		}
		else 
		{
			return (isPostalCode.arguments[1] == true);
		}
    }
	if (s.length != 6) 
	{
		return false;
	}
	return isCanadianPostalCode(s);	
}

function isCanadianPostalCode(s)
{
	var i;
	var allLetters = lowercaseLetters + uppercaseLetters;
	
	//canadian postas code has to be 6 characters long and alternate letter and number (example: A1B2C3)
	for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);
        
        if ((i%2) == 0){
			if (allLetters.indexOf(c) == -1) return false;
		}
        else
			if (digits.indexOf(c) == -1) return false;
    }    
    return true;
}


function isStateCode(s)
{   if (isEmpty(s))
       if (isStateCode.arguments.length == 1) return defaultEmptyOK;
       else return (isStateCode.arguments[1] == true);
    return ( (USStateCodes.indexOf(s) != -1) &&
             (s.indexOf(USStateCodeDelimiter) == -1) )
}

function isvalidEmailChar (s)
{   var i;

    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);

        if (! (isLetter(c) || isDigit(c) || (c=='@') || (c=='.') || (c=='_') || (c=='-') || (c=='+')) ) {
       	return false;
		}
    }

    return true;
}


function isEmail (s)
{   if (isEmpty(s))
       if (isEmail.arguments.length == 1) return defaultEmptyOK;
       else return (isEmail.arguments[1] == true);

    if (isWhitespace(s)) return false;
    if (!isvalidEmailChar(s)) return false;

    atOffset = s.lastIndexOf('@');
    if ( atOffset < 1 )
        return false;
    else {
 	dotOffset = s.indexOf('.', atOffset);

      if ( dotOffset < atOffset + 2 ||
         dotOffset > s.length - 2 ) {
         return false;
      }
   }
   return true;
}


function isYear (s)
{   if (isEmpty(s))
       if (isYear.arguments.length == 1) return defaultEmptyOK;
       else return (isYear.arguments[1] == true);
    if (!isNonnegativeInteger(s)) return false;
    return ((s.length == 2) || (s.length == 4));
}


function isIntegerInRange (s, a, b)
{   if (isEmpty(s))
       if (isIntegerInRange.arguments.length == 1) return defaultEmptyOK;
       else return (isIntegerInRange.arguments[1] == true);

    if (!isInteger(s, false)) return false;

    var num = parseInt (s);
    return ((num >= a) && (num <= b));
}


function isMonth (s)
{   if (isEmpty(s))
       if (isMonth.arguments.length == 1) return defaultEmptyOK;
       else return (isMonth.arguments[1] == true);
    return isIntegerInRange (s, 1, 12);
}


function isDay (s)
{   if (isEmpty(s))
       if (isDay.arguments.length == 1) return defaultEmptyOK;
       else return (isDay.arguments[1] == true);
    return isIntegerInRange (s, 1, 31);
}


function daysInFebruary (year)
{
    return (  ((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0) ) ) ? 29 : 28 );
}

function isDate (year, month, day)
{
    if (! (isYear(year, false) && isMonth(month, false) && isDay(day, false))) return false;

    var intYear = parseInt(year);
    var intMonth = parseInt(month);
    var intDay = parseInt(day);

    if (intDay > daysInMonth[intMonth]) return false;

    if ((intMonth == 2) && (intDay > daysInFebruary(intYear))) return false;

    return true;
}

function prompt (s)
{   window.status = s
}


function promptEntry (s)
{   window.status = pEntryPrompt + s
}


function warnEmpty (theField, s)
{   theField.focus()
    alert(mPrefix + s + mSuffix)
    return false
}


function warnInvalid (theField, s)
{   theField.focus()
    theField.select()
    alert(s)
    return false
}

//Special for for NAB
function checkExpression(theField, sExpr, emptyOK) {
    if (checkExpression.arguments.length == 2) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    return theField.eval(sExpr);
}

//NAB
function checkNumber (theField, emptyOK)
{   if (checkNumber.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else if (!isSignedFloat(theField.value, false))
       return warnInvalid (theField, iNumber);
    else return true;
}

//NAB
function checkInteger (theField, emptyOK)
{   if (checkInteger.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else if (!isSignedInteger(theField.value, false))
       return warnInvalid (theField, iInteger);
    else return true;
}

function checkPositiveInteger (theField, emptyOK)
{   if (checkPositiveInteger.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else if (!isInteger(theField.value, false))
       return warnInvalid (theField, iPositiveInteger);
    else return true;
}

function checkAlphabetic (theField, emptyOK)
{   if (checkAlphabetic.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else if (!isAlphabetic(theField.value, false))
       return warnInvalid (theField, iAlphabetic);
    else return true;
}

function checkString (theField, s, emptyOK)
{
    if (checkString.arguments.length == 2) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    if (isWhitespace(theField.value))
       return warnEmpty (theField, s);
    else return true;
}


function checkStateCode (theField, emptyOK)
{   if (checkStateCode.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else
    {  theField.value = theField.value.toUpperCase();
       if (!isStateCode(theField.value, false))
          return warnInvalid (theField, iStateCode);
       else return true;
    }
}

function reformatZIPCode (ZIPString)
{   if (ZIPString.length == 5) return ZIPString;
    else return (reformat (ZIPString, "", 5, "-", 4));
}

function reformatPostalCode (ZIPString)
{   
	return (reformat (ZIPString.toUpperCase(), "", 3, " ", 3));
}


function checkZIPCode (theField, emptyOK)
{   if (checkZIPCode.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else
    { var normalizedZIP = stripCharsInBag(theField.value, ZIPCodeDelimiters)
      if (!isZIPCode(normalizedZIP, false))
         return warnInvalid (theField, iZIPCode);
      else
      {
         theField.value = reformatZIPCode(normalizedZIP)
         return true;
      }
    }
}
function validateZIPCode (theField) {   
	var normalizedZIP = stripCharsInBag(theField.value, ZIPCodeDelimiters)
	if (normalizedZIP == "" ) {
		theField.value = "";
		return;
	}
    if (!isZIPCode(normalizedZIP)) {
       theField.value = "";
       //alert("Invalid Zipcode");
       theField.focus();
       return false;
    }
    else
    {
       theField.value = reformatZIPCode(normalizedZIP)
       return true;
    }
}

function validateYear(theField) {
	var inValue = theField.value;
	var today = new Date();
	var maxYear = today.getFullYear() + 1;
	if (isInteger(inValue)) {
	
		var intYear = parseInt(inValue);
		if ( (intYear < 1990) || (intYear > maxYear)) {
			inValue = ""
		}
	}
	else {
		inValue = ""
	}
	theField.value = inValue;
}

function reformatUSPhone (USPhone)
{   return (reformat (USPhone, "(", 3, ") ", 3, "-", 4))
}


function checkUSPhone (theField, emptyOK)
{   if (checkUSPhone.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else
    {  var normalizedPhone = stripCharsInBag(theField.value, phoneNumberDelimiters)
       if (!isUSPhoneNumber(normalizedPhone, false))
          return warnInvalid (theField, iUSPhone);
       else
       {
          //theField.value = reformatUSPhone(normalizedPhone)
          theField.value = normalizedPhone;
          return true;
       }
    }
}


function checkInternationalPhone (theField, emptyOK)
{   if (checkInternationalPhone.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else
    {  if (!isInternationalPhoneNumber(theField.value, false))
          return warnInvalid (theField, iWorldPhone);
       else return true;
    }
}


function checkEmail (theField, emptyOK)
{	if (checkEmail.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else if (!isEmail(theField.value, false))
       return warnInvalid (theField, iEmail);
    else return true;
}


function reformatSSN (SSN)
{   return (reformat (SSN, "", 3, "-", 2, "-", 4))
}


function checkSSN (theField, emptyOK)
{   if (checkSSN.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else
    {  var normalizedSSN = stripCharsInBag(theField.value, SSNDelimiters)
       if (!isSSN(normalizedSSN, false))
          return warnInvalid (theField, iSSN);
       else
       {
          theField.value = reformatSSN(normalizedSSN)
          return true;
       }
    }
}

function checkYear (theField, emptyOK)
{   if (checkYear.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    if (!isYear(theField.value, false))
       return warnInvalid (theField, iYear);
    else return true;
}


function checkMonth (theField, emptyOK)
{   if (checkMonth.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    if (!isMonth(theField.value, false))
       return warnInvalid (theField, iMonth);
    else return true;
}


function checkDay (theField, emptyOK)
{   if (checkDay.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    if (!isDay(theField.value, false))
       return warnInvalid (theField, iDay);
    else return true;
}


function checkDate (theField, emptyOK)
{   if (checkDate.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    if (!isValidDate(theField.value, false))
       return warnInvalid (theField, iDate);
    else return true;
}

function isValidDate(s) {
  d = new Date(s)
  if (isNaN( d.valueOf() ))
    return false;

  sArray = s.split("/")
  if (sArray.length > 3)
    return false;

  md1 = sArray[0];
  md2 = sArray[1];
  y = sArray[2];

  if ( (md1 > 31) || (md1 < 0) || (md2 > 31) || (md2 < 0) || (y < 0) || (y > 99999) )
     return false;

  if ( (md1 > 12) && (md2 > 12))
    return false;

    return true;
}


/*
function checkDate (yearField, monthField, dayField, labelString, OKtoOmitDay)
{
    if (checkDate.arguments.length == 4) OKtoOmitDay = false;
    if (!isYear(yearField.value)) return warnInvalid (yearField, iYear);
    if (!isMonth(monthField.value)) return warnInvalid (monthField, iMonth);
    if ( (OKtoOmitDay == true) && isEmpty(dayField.value) ) return true;
    else if (!isDay(dayField.value))
       return warnInvalid (dayField, iDay);
    if (isDate (yearField.value, monthField.value, dayField.value))
       return true;
    alert (iDatePrefix + labelString + iDateSuffix)
    return false
}
*/

function checkCreditCard (theField, emptyOK)
{   if (checkCreditCard.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    if (!isAnyCard(theField.value))
       return warnInvalid (theField, iCreditCard)
    else return true;
}


function isCreditCard(st) {
  // Encoding only works on cards with less than 19 digits
  if (st.length > 19)
    return (false);

  sum = 0; mul = 1; l = st.length;
  for (i = 0; i < l; i++) {
    digit = st.substring(l-i-1,l-i);
    tproduct = parseInt(digit ,10)*mul;
    if (tproduct >= 10)
      sum += (tproduct % 10) + 1;
    else
      sum += tproduct;
    if (mul == 1)
      mul++;
    else
      mul--;
  }

  if ((sum % 10) == 0)
    return (true);
  else
    return (false);

}


function isVisa(cc)
{
  if (((cc.length == 16) || (cc.length == 13)) &&
      (cc.substring(0,1) == 4))
    return isCreditCard(cc);
  return false;
}


function isMasterCard(cc)
{
  firstdig = cc.substring(0,1);
  seconddig = cc.substring(1,2);
  if ((cc.length == 16) && (firstdig == 5) &&
      ((seconddig >= 1) && (seconddig <= 5)))
    return isCreditCard(cc);
  return false;

}



function isAmericanExpress(cc)
{
  firstdig = cc.substring(0,1);
  seconddig = cc.substring(1,2);
  if ((cc.length == 15) && (firstdig == 3) &&
      ((seconddig == 4) || (seconddig == 7)))
    return isCreditCard(cc);
  return false;

}


function isDinersClub(cc)
{
  firstdig = cc.substring(0,1);
  seconddig = cc.substring(1,2);
  if ((cc.length == 14) && (firstdig == 3) &&
      ((seconddig == 0) || (seconddig == 6) || (seconddig == 8)))
    return isCreditCard(cc);
  return false;
}



function isCarteBlanche(cc)
{
  return isDinersClub(cc);
}


function isDiscover(cc)
{
  first4digs = cc.substring(0,4);
  if ((cc.length == 16) && (first4digs == "6011"))
    return isCreditCard(cc);
  return false;

}


function isEnRoute(cc)
{
  first4digs = cc.substring(0,4);
  if ((cc.length == 15) &&
      ((first4digs == "2014") ||
       (first4digs == "2149")))
    return isCreditCard(cc);
  return false;
}

function isJCB(cc)
{
  first4digs = cc.substring(0,4);
  if ((cc.length == 16) &&
      ((first4digs == "3088") ||
       (first4digs == "3096") ||
       (first4digs == "3112") ||
       (first4digs == "3158") ||
       (first4digs == "3337") ||
       (first4digs == "3528")))
    return isCreditCard(cc);
  return false;

}

function isAnyCard(cc)
{
  if (!isCreditCard(cc))
    return false;
  if (!isMasterCard(cc) && !isVisa(cc))
		return false;
  if (!isMasterCard(cc) && !isVisa(cc) && !isAmericanExpress(cc) && !isDinersClub(cc) &&
      !isDiscover(cc) && !isEnRoute(cc) && !isJCB(cc)) {
    return false;
  }
  return true;

}

function isCardMatch (cardType, cardNumber)
{

	cardType = cardType.toUpperCase();
	var doesMatch = true;

	if ((cardType == "VISA") && (!isVisa(cardNumber)))
		doesMatch = false;
	if ((cardType == "MASTERCARD") && (!isMasterCard(cardNumber)))
		doesMatch = false;
	if ( ( (cardType == "AMERICANEXPRESS") || (cardType == "AMEX") )
                && (!isAmericanExpress(cardNumber))) doesMatch = false;
	if ((cardType == "DISCOVER") && (!isDiscover(cardNumber)))
		doesMatch = false;
	if ((cardType == "JCB") && (!isJCB(cardNumber)))
		doesMatch = false;
	if ((cardType == "DINERS") && (!isDinersClub(cardNumber)))
		doesMatch = false;
	if ((cardType == "CARTEBLANCHE") && (!isCarteBlanche(cardNumber)))
		doesMatch = false;
	if ((cardType == "ENROUTE") && (!isEnRoute(cardNumber)))
		doesMatch = false;
	return doesMatch;

}

function IsCC (st) {
    return isCreditCard(st);
}

function IsVisa (cc)  {
  return isVisa(cc);
}

function IsVISA (cc)  {
  return isVisa(cc);
}

function IsMasterCard (cc)  {
  return isMasterCard(cc);
}

function IsMastercard (cc)  {
  return isMasterCard(cc);
}

function IsMC (cc)  {
  return isMasterCard(cc);
}

function IsAmericanExpress (cc)  {
  return isAmericanExpress(cc);
}

function IsAmEx (cc)  {
  return isAmericanExpress(cc);
}

function IsDinersClub (cc)  {
  return isDinersClub(cc);
}

function IsDC (cc)  {
  return isDinersClub(cc);
}

function IsDiners (cc)  {
  return isDinersClub(cc);
}

function IsCarteBlanche (cc)  {
  return isCarteBlanche(cc);
}

function IsCB (cc)  {
  return isCarteBlanche(cc);
}

function IsDiscover (cc)  {
  return isDiscover(cc);
}

function IsEnRoute (cc)  {
  return isEnRoute(cc);
}

function IsenRoute (cc)  {
  return isEnRoute(cc);
}

function IsJCB (cc)  {
  return isJCB(cc);
}

function IsAnyCard(cc)  {
  return isAnyCard(cc);
}

function IsCardMatch (cardType, cardNumber)  {
  return isCardMatch (cardType, cardNumber);
}

// For NAB
function checkFields(theForm) {
  clientOK = false;
  returnValue = true;

  if ( (navigator.appName.indexOf("Microsoft")!=-1) && (navigator.appVersion.indexOf("4.")!=-1) ) {
    undef = void 0;
    clientOK = true;
  } else if ( (navigator.appName.indexOf("Netscape")!=-1) && ( (navigator.appVersion.indexOf("4.")!=-1) || (navigator.appVersion.indexOf("3.")!=-1) )) {
    undef = "undefined";
    clientOK = true;
  }

  if (clientOK) {

    for (i=0; i<theForm.elements.length; i++) {
//	alert("Inside first for loop");
      e = theForm.elements[i]
      if ( ((e.type=="text") || (e.type=="textarea") || (e.type=="password")) && e.required && (e.value=="")) {
        returnValue = false
        break;
      }
      if ( (e.type=="select-one") && e.required && (e[e.selectedIndex].value == "-1")) {
	  	returnValue = false
	  	break;
	  }
    }

    if (!returnValue) {
      alert("Form not submitted - please enter a value for this field")
      e.focus()

    } else {
      for (k=0; k<theForm.elements.length; k++) {
//    	alert("Inside second for loop");	  
    	e = theForm.elements[k]
    	if ( (e.type=="text") || (e.type=="textarea") || (e.type=="password")) {
          if ( undef != e.onchange ) {
	    returnValue = e.onchange();
	    if (!returnValue)
              break;
	  }
        }
      }
    }
  }
  return returnValue;
}

// Added to check the Email for dots and the @s...



function checkEmailField(fieldName) 
 { 
	 
	var email=fieldName.value ;
	var periodCnt=0;

	invalidChars = " ~\\^\\`\\\"*+=\\|][(){}$&!#%/:,;<>?" ; // removed apostrophe as it is valid in email.
	 
	for (i=0; i<invalidChars.length; i++) 
        {	 
	
		badChar = invalidChars.charAt(i) ;
		if (email.indexOf(badChar,0) > -1)  
		{ 
			return false ;
		} 
	} 
	
	lengthOfEmail = email.length ;
	if( (email.charAt(lengthOfEmail - 1) == '.') || (email.charAt(lengthOfEmail - 2) == '.'))
	{ 
		return false ;
	} 
	Pos = email.indexOf('@',0);
	if(email.charAt(Pos + 1) == '.') 		
	{ 
		return false ;
	} 
	while((Pos < lengthOfEmail) && ( Pos != -1)) 
	{ 
		Pos = email.indexOf('.',Pos);
		
		if(email.charAt(Pos + 1) == '.')      // checks for '.' in the beginning of the address
		{ 
			
			return false;
		} 
		if(Pos != -1)
		{ 
			Pos++;
		} 
	} 
    
   atPos = email.indexOf('@',0);		// there must be one '@' symbol
    
	if (atPos == 0)  
	{ 
		return false ;
	} 
	if (atPos == -1)  
	{ 
		return false; 
	} 
	if (email.indexOf('@',atPos+1) != -1)	// and only one '@' symbol 
	{	 
		return false; 
	}
	
	for(i=0 ; i<atPos ; i++)    // check for two periods before '@' symbols
	{
		if((email.charAt(i)== '.'))
			periodCnt++;
		if((email.charAt(i)== '.') && (email.charAt(i+1) == '@')) // period and '@' cannot occur to-gether
			return false;
	}
	
	if(periodCnt > 2)  // To make the check for the two dots in the email as sandeep.g.sonkusale@
	
	{
		return false;
	}
		 
	periodPos = email.indexOf('.',atPos); 
	
	if (periodPos == -1) 			// and at least one '.' after the '@' 
        {                        
		return false; 
	} 
        if (periodPos+3 > email.length) 
        {     // must be at least 2 characters after the '.' 
		return false; 
	} 
	return true; 
 }
 
/*     
	Created By			: Yuttana Buasen
	Date				: 02/17/2004
	Called From			: 
	Change History:	    : Sushant Shah
	                    : 09/27/2007
	                    : Removed Check Digit Logic Work item 1299
*/
strVinChars = "ABCDEFGHJKLMNPRSTUVWXYZ1234567890";
arrVinValues = new Array (1,2,3,4,5,6,7,8,1,2,3,4,5,7,9,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8,9,0);
arrVinWeights = new Array (8,7,6,5,4,3,2,10,0,9,8,7,6,5,4,3,2);

function ValidateVINCheckDigit(strVin) 
{
	if (strVin.length!=17) 
	{
		// if VIN length is invalid then return false
		return false;  
	}
	
	/*var i;
	var intSum = 0;
	var intPos;
	for (i=0; i<17; i++) 
	{
		intPos = strVinChars.indexOf(strVin.charAt(i));
		if (intPos<0) 
		{  
			// if invalid character found in VIN then return false
			return false;			
		}
		
		// multiply value of VIN character times weight of its position in VIN
		// add them all up
		intSum += (arrVinValues[intPos] * arrVinWeights[i]);
	}
	
	var intRemainder;
	var strCheckDigit;
	
	// divide the total by 11 and use the remainder
	intRemainder = intSum % 11;	
	
	// If the remainder is 10, the check digit is X. 
	// Otherwise the remainder becomes the check digit of 0-9.
	if (intRemainder==10)
	{	
		strCheckDigit = 'X';		
	}	
	else
	{
		strCheckDigit = intRemainder.toString();
	}
		
	return (strCheckDigit==strVin.charAt(8));*/
	return true;
}

/*     
	Created By			: Rachana Shah
	Date				: 04/27/2007
	Called From			: 
	Change History      : Created
	Summary             : This function accepts a string variable and verifies if it is a proper date or not. It validates format matching either
	                      mm-dd-yyyy or mm/dd/yyyy. Then it checks to make sure the month has the proper number of days, based on which month it is.
	                      The function returns true if a valid date, false if not.
*/
function isDate(dateStr) 
{
    var datePat = /^(\d{1,2})(\/|-)(\d{1,2})(\/|-)(\d{4})$/;
    var matchArray = dateStr.match(datePat); // is the format ok?

    if (matchArray == null) 
    {
        //alert("Please enter date as either mm/dd/yyyy or mm-dd-yyyy.");
        return false;
    }

    month = matchArray[1]; // p@rse date into variables
    day = matchArray[3];
    year = matchArray[5];

    // check month range
    if (month < 1 || month > 12) 
    {
        //alert("Month must be between 1 and 12.");
        return false;
    }

    if (day < 1 || day > 31) 
    {
        //alert("Day must be between 1 and 31.");
        return false;
    }

    if ((month==4 || month==6 || month==9 || month==11) && day==31) 
    {
        //alert("Month "+month+" doesn`t have 31 days!")
        return false;
    }

    // check for february 29th
    if (month == 2) 
    { 
        var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
        if (day > 29 || (day==29 && !isleap)) 
        {
            //alert("February " + year + " doesn`t have " + day + " days!");
            return false;
        }
    }
    return true; // date is valid
}