// FormCheck.js
//
// SUMMARY
//
// This is a set of JavaScript functions for validating input on
// an HTML form.  Functions are provided to validate:
//
//      - U.S. and international phone/fax numbers
//      - U.S. ZIP codes (5 or 9 digit postal codes)
//      - Canadian Postal Codes (6 digit postal codes)
//      - U.S. Postal Codes (2 letter abbreviations for names of states)
//      - U.S. Social Security Numbers (abbreviated as SSNs)
//      - email addresses
//	    - dates (entry of year, month, and day and validity of combined date)
//	    - credit card numbers
//
// Supporting utility functions validate that:
//
//      - characters are Letter, Digit, or LetterOrDigit
//      - strings are a Signed, Positive, Negative, Nonpositive, or
//        Nonnegative integer
//      - strings are a Float or a SignedFloat
//      - strings are Alphabetic, Alphanumeric, or Whitespace
//      - strings contain an integer within a specified range
//
// Functions are also provided to interactively check the
// above kinds of data and prompt the user if they have
// been entered incorrectly.
//
// Other utility functions are provided to:
//
// 	- remove from a string characters which are/are not
//	  in a "bag" of selected characters
// 	- reformat a string, adding delimiter characters
//	- strip whitespace/leading whitespace from a string
//      - reformat U.S. phone numbers, ZIP codes, and Social
//        Security numbers
//
//
// Many of the below functions take an optional parameter eok (for "emptyOK")
// which determines whether the empty string will return true or false.
// Default behavior is controlled by global variable defaultEmptyOK.
//
// BASIC DATA VALIDATION FUNCTIONS:
//
// isWhitespace (s)                    Check whether string s is empty or whitespace.
// isLetter (c)                        Check whether character c is an English letter
// isDigit (c)                         Check whether character c is a digit
// isLetterOrDigit (c)                 Check whether character c is a letter or digit.
// isInteger (s [,eok])                True if all characters in string s are numbers.
// isSignedInteger (s [,eok])          True if all characters in string s are numbers; leading + or - allowed.
// isPositiveInteger (s [,eok])        True if string s is an integer > 0.
// isNonnegativeInteger (s [,eok])     True if string s is an integer >= 0.
// isNegativeInteger (s [,eok])        True if s is an integer < 0.
// isNonpositiveInteger (s [,eok])     True if s is an integer <= 0.
// isFloat (s [,eok])                  True if string s is an unsigned floating point (real) number. (Integers also OK.)
// isSignedFloat (s [,eok])            True if string s is a floating point number; leading + or - allowed. (Integers also OK.)
// isAlphabetic (s [,eok])             True if string s is English letters
// isAlphanumeric (s [,eok])           True if string s is English letters and numbers only.
//
// isSSN (s [,eok])                    True if string s is a valid U.S. Social Security Number.
// isUSPhoneNumber (s [,eok])          True if string s is a valid U.S. Phone Number.
// isInternationalPhoneNumber (s [,eok]) True if string s is a valid international phone number.
// isZIPCode (s [,eok])                True if string s is a valid U.S. ZIP code.
// isPostalCode (s, [,eok])            True if string s is a valid Canadian postal code.
// isStateCode (s [,eok])              True if string s is a valid U.S. Postal Code
// isEmail (s [,eok])                  True if string s is a valid email address.
// isYear (s [,eok])                   True if string s is a valid Year number.
// isYearShort (s [,eok])              True if string s is a valid 2 digit Year number.
// isIntegerInRange (s, a, b [,eok])   True if string s is an integer between a and b, inclusive.
// isMonth (s [,eok])                  True if string s is a valid month between 1 and 12.
// isDay (s [,eok])                    True if string s is a valid day between 1 and 31.
// daysInFebruary (year)               Returns number of days in February of that year.
// isDate (year, month, day)           True if string arguments form a valid date.
// isTime (h, m, ampm)                 True if string s is a valid time.
// isHour (s, ampm)                    True if string s is a valid hour.
// isMinute (s)                        True if string s is a valid minute number between 1 and 59


// FUNCTIONS TO REFORMAT DATA:
//
// stripCharsInBag (s, bag)            Removes all characters in string bag from string s.
// stripCharsNotInBag (s, bag)         Removes all characters NOT in string bag from string s.
// stripWhitespace (s)                 Removes all whitespace characters from s.
// stripInitialWhitespace (s)          Removes initial (leading) whitespace characters from s.
// reformat (TARGETSTRING, STRING,     Function for inserting formatting characters or
//   INTEGER, STRING, INTEGER ... )       delimiters into TARGETSTRING.
// reformatZIPCode (ZIPString)         If 9 digits, inserts separator hyphen.
// reformatPostalCode (PostalCode)     Reformats as M5E 1W1.
// reformatSSN (SSN)                   Reformats as 123-45-6789.
// reformatUSPhone (USPhone)           Reformats as (123) 456-789.


// FUNCTIONS TO PROMPT USER:
//
// prompt (s)                          Display prompt string s in status bar.
// promptEntry (s)                     Display data entry prompt string s in status bar.
// warnEmpty (theField, s)             Notify user that required field theField is empty.
// warnInvalid (theField, s)           Notify user that contents of field theField are invalid.


// FUNCTIONS TO INTERACTIVELY CHECK FIELD CONTENTS:
//
// checkString (theField, s [,eok])    Check that theField.value is not empty or all whitespace.
// checkNumber (theField, s [,eok])    Check that theField.value is not empty or all whitespace and is an integer >= 0.
// checkFloat (theField, s [,eok])     Check that theField.value is not empty or all whitespace and is a float >= 0.
// checkStateCode (theField)           Check that theField.value is a valid U.S. state code.
// checkZIPCode (theField [,eok])      Check that theField.value is a valid U.S. ZIP code or Canadian postal code.
// checkUSPhone (theField [,eok])      Check that theField.value is a valid US Phone.
// checkInternationalPhone (theField [,eok])  Check that theField.value is a valid International Phone.
// checkEmail (theField [,eok])        Check that theField.value is a valid Email.
// checkSSN (theField [,eok])          Check that theField.value is a valid SSN.
// checkYear (theField [,eok])         Check that theField.value is a valid Year.
// checkYearShort (theField [,eok])    Check that theField.value is a valid Short Year (2 digits).
// checkMonth (theField [,eok])        Check that theField.value is a valid Month.
// checkDay (theField [,eok])          Check that theField.value is a valid Day.
// checkStrDate (theField, s [,eok])   Check that theField.value is a valid Date.
// checkStrDateAll (theField, s [,eok])   Check that theField.value is a valid Date in all kinds of forms allowed in the system.
// checkDate (yearField, monthField, dayField, labelString, OKtoOmitDay)
//                                     Check that field values form a valid date.
// checkTime (theField, s, ampm [, eok])
//                                     Check that string theField.value is a valid Time.
// getRadioButtonValue (radio)         Get checked value from radio button.
// checkLength (theField, s, min, max, [, emptyOK) Check that theField.value contains >= min characters and <= max character.
// checkSameValues (theField1, theField2, s1, s2)
//                                     Check that theField1.value equals theField2.value.
// checkSelectValue (theField, s [,eok])
//                                     Check that theField.value is not empty.
// checkCheckboxValue (checkbox, s)    Check that at least one checkbox is checked.
// checkCreditCard (radio, theField)   Validate credit card info.


// CREDIT CARD DATA VALIDATION FUNCTIONS
//
// isCreditCard (st)              True if credit card number passes the Luhn Mod-10 test.
// isVisa (cc)                    True if string cc is a valid VISA number.
// isMasterCard (cc)              True if string cc is a valid MasterCard number.
// isAmericanExpress (cc)         True if string cc is a valid American Express number.
// isDinersClub (cc)              True if string cc is a valid Diner's Club number.
// isCarteBlanche (cc)            True if string cc is a valid Carte Blanche number.
// isDiscover (cc)                True if string cc is a valid Discover card number.
// isEnRoute (cc)                 True if string cc is a valid enRoute card number.
// isJCB (cc)                     True if string cc is a valid JCB card number.
// isAnyCard (cc)                 True if string cc is a valid card number for any of the accepted types.
// isCardMatch (Type, Number)     True if Number is valid for credic card of type Type.
//
// Other stub functions are retained for backward compatibility with LivePayment code.
// See comments below for details.
//
// Performance hint: when you deploy this file on your website, strip out the
// comment lines from the source code as well as any of the functions which
// you don't need.  This will give you a smaller .js file and achieve faster
// downloads.
//
// 18 Feb 97 created Eric Krock
//
// (c) 1997 Netscape Communications Corporation



// VARIABLE DECLARATIONS

var digits = "0123456789";

var lowercaseLetters = "abcdefghijklmnopqrstuvwxyz"

var uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"


// whitespace characters
var whitespace = " \t\n\r";


// decimal point character differs by language and culture
var decimalPointDelimiter = "."


// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
var pstDelimiter = "-";






// characters which are allowed in US phone numbers
var validUSPhoneChars = digits + phoneNumberDelimiters;


// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = digits + phoneNumberDelimiters + "+";


// non-digit characters which are allowed in
// Social Security Numbers
var SSNDelimiters = "- ";


// non-digit characters which are allowed in
// Date
var DATEDelimiters = "/";


// non-digit characters which are allowed in
// Time
var TIMEDelimiters = ":";


// characters which are allowed in Social Security Numbers
var validSSNChars = digits + SSNDelimiters;


// U.S. Social Security Numbers have 9 digits.
// They are formatted as 123-45-6789.
var digitsInSocialSecurityNumber = 9;


// U.S. phone numbers have 10 digits.
// They are formatted as 123 456 7890 or (123) 456-7890.
var digitsInUSPhoneNumber = 10;

var digitInPST = 8;

// non-digit characters which are allowed in ZIP Codes
var ZIPCodeDelimiters = "-";


// our preferred delimiter for reformatting ZIP Codes
var ZIPCodeDelimiter = "-"


// non-digit characters which are allowed in Postal Codes
var PostalCodeDelimiters = " ";


// our preferred delimiter for reformatting Postal Codes
var PostalCodeDelimiter = " ";


// characters which are allowed in Social Security Numbers
var validZIPCodeChars = digits + ZIPCodeDelimiters


// U.S. ZIP codes have 5 or 9 digits.
// They are formatted as 12345 or 12345-6789.
var digitsInZIPCode1 = 5
var digitsInZIPCode2 = 9


// Canadian postal codes have 6 digits.
// They are formatted as M5E 1W1.
var digitsInPostalCode = 6


// non-digit characters which are allowed in credit card numbers
var creditCardDelimiters = " "



// Global variable defaultEmptyOK defines default return value
// for many functions when they are passed the empty string.
// By default, they will return defaultEmptyOK.
//
// defaultEmptyOK is false, which means that by default,
// these functions will do "strict" validation.  Function
// isInteger, for example, will only return true if it is
// passed a string containing an integer; if it is passed
// the empty string, it will return false.
//
// You can change this default behavior globally (for all
// functions which use defaultEmptyOK) by changing the value
// of defaultEmptyOK.
//
// Most of these functions have an optional argument emptyOK
// which allows you to override the default behavior for
// the duration of a function call.
//
// This functionality is useful because it is possible to
// say "if the user puts anything in this field, it must
// be an integer (or a phone number, or a string, etc.),
// but it's OK to leave the field empty too."
// This is the case for fields which are optional but which
// must have a certain kind of content if filled in.

var defaultEmptyOK = false


// Attempting to make this library run on Navigator 2.0,
// so I'm supplying this array creation routine as per
// JavaScript 1.0 documentation.  If you're using
// Navigator 3.0 or later, you don't need to do this;
// you can use the Array constructor instead.

function makeArray(n)
{
    //*** BUG: If I put this line in, I get two error messages:
    //(1) Window.length can't be set by assignment
    //(2) daysInMonth has no property indexed by 4
    //If I leave it out, the code works fine.
    //   this.length = 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;


// Valid U.S. Postal Codes for states, territories, armed forces, etc.
// See http://www.usps.gov/ncsc/lookups/abbr_state.txt.

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"



// Check whether string s is empty.

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



// Returns true if string s is empty or
// whitespace characters only.

function isWhitespace (s)
{
    var i;

    // Is s empty?
    if (isEmpty(s))
        return true;

    // Search through string's characters one by one
    // until we find a non-whitespace character.
    // When we do, return false; if we don't, return true.
    for (i = 0; i < s.length; i++)
    {
        // Check that current character isn't whitespace.
        var c = s.charAt(i);

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

    // All characters are whitespace.
    return true;
}



// Removes all characters which appear in string bag from string s.

function stripCharsInBag (s, bag)
{
    var i;
    var returnString = "";

    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }

    return returnString;
}



// Removes all characters which do NOT appear in string bag
// from string s.

function stripCharsNotInBag (s, bag)
{
    var i;
    var returnString = "";

    // Search through string's characters one by one.
    // If character is in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) != -1) returnString += c;
    }

    return returnString;
}



// Removes all whitespace characters from s.
// Global variable whitespace (see above)
// defines which characters are considered whitespace.

function stripWhitespace (s)
{
    return stripCharsInBag (s, whitespace)
}



// WORKAROUND FUNCTION FOR NAVIGATOR 2.0.2 COMPATIBILITY.
//
// The below function *should* be unnecessary.  In general,
// avoid using it.  Use the standard method indexOf instead.
//
// However, because of an apparent bug in indexOf on
// Navigator 2.0.2, the below loop does not work as the
// body of stripInitialWhitespace:
//
// while ((i < s.length) && (whitespace.indexOf(s.charAt(i)) != -1))
//   i++;
//
// ... so we provide this workaround function charInString
// instead.
//
// charInString (CHARACTER c, STRING s)
//
// Returns true if single character c (actually a string)
// is contained within string s.

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



// Removes initial (leading) whitespace characters from s.
// Global variable whitespace (see above)
// defines which characters are considered whitespace.

function stripInitialWhitespace (s)
{
    var i = 0;

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

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



// Returns true if character c is an English letter
// (A .. Z, a..z).
//
// NOTE: Need i18n version to support European characters.
// This could be tricky due to different character
// sets and orderings for various languages and platforms.

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



// Returns true if character c is a digit
// (0 .. 9).

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



// Returns true if character c is a letter or digit.

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



// isInteger (STRING s [, BOOLEAN emptyOK])
//
// Returns true if all characters in string s are numbers.
//
// Accepts non-signed integers only. Does not accept floating
// point, exponential notation, etc.
//
// We don't use parseInt because that would accept a string
// with trailing non-numeric characters.
//
// By default, returns defaultEmptyOK if s is empty.
// There is an optional second argument called emptyOK.
// emptyOK is used to override for a single function call
//      the default behavior which is specified globally by
//      defaultEmptyOK.
// If emptyOK is false (or any value other than true),
//      the function will return false if s is empty.
// If emptyOK is true, the function will return true if s is empty.
//
// EXAMPLE FUNCTION CALL:     RESULT:
// isInteger ("5")            true
// isInteger ("")             defaultEmptyOK
// isInteger ("-5")           false
// isInteger ("", true)       true
// isInteger ("", false)      false
// isInteger ("5", false)     true

function isInteger (s)
{
    var i;

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

    // Search through string's characters one by one
    // until we find a non-numeric character.
    // When we do, return false; if we don't, return true.
    for (i = 0; i < s.length; i++)
    {
        // Check that current character is number.
        var c = s.charAt(i);

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

    // All characters are numbers.
    return true;
}



// isSignedInteger (STRING s [, BOOLEAN emptyOK])
//
// Returns true if all characters are numbers;
// first character is allowed to be + or - as well.
//
// Does not accept floating point, exponential notation, etc.
//
// We don't use parseInt because that would accept a string
// with trailing non-numeric characters.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.
//
// EXAMPLE FUNCTION CALL:          RESULT:
// isSignedInteger ("5")           true
// isSignedInteger ("")            defaultEmptyOK
// isSignedInteger ("-5")          true
// isSignedInteger ("+5")          true
// isSignedInteger ("", false)     false
// isSignedInteger ("", true)      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];

        // skip leading + or -
        if ( (s.charAt(0) == "-") || (s.charAt(0) == "+") )
            startPos = 1;

        return (isInteger(s.substring(startPos, s.length), secondArg))
    }
}



// isPositiveInteger (STRING s [, BOOLEAN emptyOK])
//
// Returns true if string s is an integer > 0.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isPositiveInteger (s)
{
    var secondArg = defaultEmptyOK;

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

    // The next line is a bit byzantine.  What it means is:
    // a) s must be a signed integer, AND
    // b) one of the following must be true:
    //    i)  s is empty and we are supposed to return true for
    //        empty strings
    //    ii) this is a positive, not negative, number

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



// isNonnegativeInteger (STRING s [, BOOLEAN emptyOK])
//
// Returns true if string s is an integer >= 0.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isNonnegativeInteger (s)
{
    var secondArg = defaultEmptyOK;

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

    // The next line is a bit byzantine.  What it means is:
    // a) s must be a signed integer, AND
    // b) one of the following must be true:
    //    i)  s is empty and we are supposed to return true for
    //        empty strings
    //    ii) this is a number >= 0

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



// isNegativeInteger (STRING s [, BOOLEAN emptyOK])
//
// Returns true if string s is an integer < 0.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isNegativeInteger (s)
{
    var secondArg = defaultEmptyOK;

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

    // The next line is a bit byzantine.  What it means is:
    // a) s must be a signed integer, AND
    // b) one of the following must be true:
    //    i)  s is empty and we are supposed to return true for
    //        empty strings
    //    ii) this is a negative, not positive, number

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



// isNonpositiveInteger (STRING s [, BOOLEAN emptyOK])
//
// Returns true if string s is an integer <= 0.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isNonpositiveInteger (s)
{
    var secondArg = defaultEmptyOK;

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

    // The next line is a bit byzantine.  What it means is:
    // a) s must be a signed integer, AND
    // b) one of the following must be true:
    //    i)  s is empty and we are supposed to return true for
    //        empty strings
    //    ii) this is a number <= 0

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



// isFloat (STRING s [, BOOLEAN emptyOK])
//
// True if string s is an unsigned floating point (real) number.
//
// Also returns true for unsigned integers. If you wish
// to distinguish between integers and floating point numbers,
// first call isInteger, then call isFloat.
//
// Does not accept exponential notation.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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 == decimalPointDelimiter) return false;

    // Search through string's characters one by one
    // until we find a non-numeric character.
    // When we do, return false; if we don't, return true.
    for (i = 0; i < s.length; i++)
    {
        // Check that current character is number.
        var c = s.charAt(i);

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

    // All characters are numbers.
    return true;
}



// isSignedFloat (STRING s [, BOOLEAN emptyOK])
//
// True if string s is a signed or unsigned floating point
// (real) number. First character is allowed to be + or -.
//
// Also returns true for unsigned integers. If you wish
// to distinguish between integers and floating point numbers,
// first call isSignedInteger, then call isSignedFloat.
//
// Does not accept exponential notation.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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))
    }
}



// isAlphabetic (STRING s [, BOOLEAN emptyOK])
//
// Returns true if string s is English letters
// (A .. Z, a..z) only.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.
//
// NOTE: Need i18n version to support European characters.
// This could be tricky due to different character
// sets and orderings for various languages and platforms.

function isAlphabetic (s)
{
    var i;

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

    // Search through string's characters one by one
    // until we find a non-alphabetic character.
    // When we do, return false; if we don't, return 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;
}



// isAlphanumeric (STRING s [, BOOLEAN emptyOK])
//
// Returns true if string s is English letters
// (A .. Z, a..z) and numbers only.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.
//
// NOTE: Need i18n version to support European characters.
// This could be tricky due to different character
// sets and orderings for various languages and platforms.

function isAlphanumeric (s)
{
    var i;

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

    // Search through string's characters one by one
    // until we find a non-alphanumeric character.
    // When we do, return false; if we don't, return true.
    for (i = 0; i < s.length; i++)
    {
        // Check that current character is number or letter.
        var c = s.charAt(i);

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

    // All characters are numbers or letters.
    return true;
}



// reformat (TARGETSTRING, STRING, INTEGER, STRING, INTEGER ... )
//
// Handy function for arbitrarily inserting formatting characters
// or delimiters of various kinds within TARGETSTRING.
//
// reformat takes one named argument, a string s, and any number
// of other arguments.  The other arguments must be integers or
// strings.  These other arguments specify how string s is to be
// reformatted and how and where other strings are to be inserted
// into it.
//
// reformat processes the other arguments in order one by one.
// * If the argument is an integer, reformat appends that number
//   of sequential characters from s to the resultString.
// * If the argument is a string, reformat appends the string
//   to the resultString.
//
// NOTE: The first argument after TARGETSTRING must be a string.
// (It can be empty.)  The second argument must be an integer.
// Thereafter, integers and strings must alternate.  This is to
// provide backward compatibility to Navigator 2.0.2 JavaScript
// by avoiding use of the typeof operator.
//
// It is the caller's responsibility to make sure that we do not
// try to copy more characters from s than s.length.
//
// EXAMPLES:
//
// * To reformat a 10-digit U.S. phone number from "1234567890"
//   to "(123) 456-7890" make this function call:
//   reformat("1234567890", "(", 3, ") ", 3, "-", 4)
//
// * To reformat a 9-digit U.S. Social Security number from
//   "123456789" to "123-45-6789" make this function call:
//   reformat("123456789", "", 3, "-", 2, "-", 4)
//
// HINT:
//
// If you have a string which is already delimited in one way
// (example: a phone number delimited with spaces as "123 456 7890")
// and you want to delimit it in another way using function reformat,
// call function stripCharsNotInBag to remove the unwanted
// characters, THEN call function reformat to delimit as desired.
//
// EXAMPLE:
//
// reformat (stripCharsNotInBag ("123 456 7890", digits),
//           "(", 3, ") ", 3, "-", 4)

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;
}



// isSSN (STRING s [, BOOLEAN emptyOK])
//
// isSSN returns true if string s is a valid U.S. Social
// Security Number.  Must be 9 digits.
//
// NOTE: Strip out any delimiters (spaces, hyphens, etc.)
// from string s before calling this function.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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)
}



// isUSPhoneNumber (STRING s [, BOOLEAN emptyOK])
//
// isUSPhoneNumber returns true if string s is a valid U.S. Phone
// Number.  Must be 10 digits.
//
// NOTE: Strip out any delimiters (spaces, hyphens, parentheses, etc.)
// from string s before calling this function.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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

    var c=s.charAt(0);
    if((c=='0')||(c=='1'))
            return false;

    return (isInteger(s) && s.length == digitsInUSPhoneNumber)
}



// isInternationalPhoneNumber (STRING s [, BOOLEAN emptyOK])
//
// isInternationalPhoneNumber returns true if string s is a valid
// international phone number.  Must be digits only; any length OK.
// May be prefixed by + character.
//
// NOTE: A phone number of all zeros would not be accepted.
// I don't think that is a valid phone number anyway.
//
// NOTE: Strip out any delimiters (spaces, hyphens, parentheses, etc.)
// from string s before calling this function.  You may leave in
// leading + character if you wish.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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



// isZIPCode (STRING s [, BOOLEAN emptyOK])
//
// isZIPCode returns true if string s is a valid
// U.S. ZIP code.  Must be 5 or 9 digits only.
//
// NOTE: Strip out any delimiters (spaces, hyphens, etc.)
// from string s before calling this function.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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)) )
}



// isPostalCode (STRING s [, BOOLEAN emptyOK])
//
// isPostalCode returns true if string s is a valid
// Canadian Postal code.  Must be 7 digits only.
//
// NOTE: Strip out any delimiters (spaces, hyphens, etc.)
// from string s before calling this function.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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

    return (isLetter(s.charAt(0)) &&
            isDigit(s.charAt(1)) &&
            isLetter(s.charAt(2)) &&
            isDigit(s.charAt(3)) &&
            isLetter(s.charAt(4)) &&
            isDigit(s.charAt(5)));
}



// isStateCode (STRING s [, BOOLEAN emptyOK])
//
// Return true if s is a valid U.S. Postal Code
// (abbreviation for state).
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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 isOneEmail (s)
{
    var i = 0;
    var sLength = s.length;

    var atNumber=0;
    var dotNumber=0;
    var currentAt=-1;
    var currentDot=-1;

    while(i<sLength)
    {
       if(s.charAt(i) == ".")
       {
	 if(i==0) return false;
	 if(i>sLength-3) return false;

	 if(currentAt==i-1) return false;
	 if(currentDot==i-1) return false;

       	 currentDot=i;
       	 dotNumber++;
       }

       if(s.charAt(i) == "@")
       {
          if(i==0) return false;
          if(i>sLength-5) return false;

          if(atNumber>0) return false;
          if(currentDot==i-1) return false;

          currentAt=i;
          atNumber++;
       }

       i++;
    }

    if( (atNumber==0) || (dotNumber==0) )
      return false;

    return true;
}

// isEmail (STRING s [, BOOLEAN emptyOK])
//
// Email address must be of form a@b.c -- in other words:
// * there must be at least one character before the @
// * there must be at least one character before and after the .
// * the characters @ and . are both required
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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

    if (isWhitespace(s)) return false;

    var i = 0;
    var sLength = s.length;
    var sb="";

    if((s.indexOf(";")==0) || (s.indexOf(";")==sLength-1))
       return false;

    while(i<sLength)
    {
             if(s.charAt(i)==";"){
                if(isWhitespace(sb)) return false;

    	        if(!isOneEmail(sb)) return false;
    	        else sb="";
              }
              else
                sb+=s.charAt(i);
           i++;
     }

     return isOneEmail(sb);
}



// isYear (STRING s [, BOOLEAN emptyOK])
// OR
// isYearShort (STRING s [, BOOLEAN emptyOK])
//
// isYear returns true if string s is a valid
// Year number.  Must be 2 or 4 digits only.
//
// For Year 2000 compliance, you are advised
// to use 4-digit year numbers everywhere.
//
// And yes, this function is not Year 10000 compliant, but
// because I am giving you 8003 years of advance notice,
// I don't feel very guilty about this ...
//
// For B.C. compliance, write your own function. ;->
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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

    if (!isNonnegativeInteger(s)) return false;

    if (s > 2050 || s < 1900)
       return false;

    return (s.length == 4);
}

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

    if (!isNonnegativeInteger(s)) return false;

  //  return ((s.length == 2) || (s.length == 4));
  	return (s.length == 2);
}


// isIntegerInRange (STRING s, INTEGER a, INTEGER b [, BOOLEAN emptyOK])
//
// isIntegerInRange returns true if string s is an integer
// within the range of integer arguments a and b, inclusive.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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

    // Catch non-integer strings to avoid creating a NaN below,
    // which isn't available on JavaScript 1.0 for Windows.
    if (!isInteger(s, false)) return false;

    // Remove the leading zero so that parseInt() function will
    // work properly.
    if ((s.substring(0, 1) == 0) && (s.length > 1))
    {
        s = s.substring(1, s.length);
    }

    // Now, explicitly change the type to integer via parseInt
    // so that the comparison code below will work both on
    // JavaScript 1.2 (which typechecks in equality comparisons)
    // and JavaScript 1.1 and before (which doesn't).
    var num = parseInt (s);

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



// isMonth (STRING s [, BOOLEAN emptyOK])
//
// isMonth returns true if string s is a valid
// month number between 1 and 12.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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



// isDay (STRING s [, BOOLEAN emptyOK])
//
// isDay returns true if string s is a valid
// day number between 1 and 31.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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



// daysInFebruary (INTEGER year)
//
// Given integer argument year,
// returns number of days in February of that year.

function daysInFebruary (year)
{
    // February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (  ((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0) ) ) ? 29 : 28 );
}



// isDate (STRING year, STRING month, STRING day)
//
// isDate returns true if string arguments year, month, and day
// form a valid date.
//

function isDate (year, month, day)
{
    // catch invalid years (not 2- or 4-digit) and invalid months and days.
    if (! (isYear(year, false) && isMonth(month, false) && isDay(day, false)))
        return false;

    // Explicitly change type to integer to make code work in both
    // JavaScript 1.1 and JavaScript 1.2.
    var intYear = parseInt(year);
    var intMonth = parseInt(month);
    var intDay = parseInt(day);

    // catch invalid days, except for February
    if (intDay > daysInMonth[intMonth]) return false;

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

    return true;
}

//
// Checks if the date is empty
//
function isDateEmpty(year, month, day){
	if (isEmpty(year) && isEmpty(month) && isEmpty(day))
      return true;

	return false;
}

//
// Checks if the date is a valid date. Empty dates are ok.
//
function isDateEmptyOk(year, month, day) {
   if (isDateEmpty(year, month, day))
      return true;

   return isValidDate(year, month, day);
}

//
// Is the date a valid date
//
function isValidDate(year, month, day){
	if(isEmpty(year)) return false;
	if(isEmpty(month)) return false;
	if(isEmpty(day)) return false;
	if(!isInteger(year)) return false;
	if(!isInteger(month)) return false;
	if(!isInteger(day)) return false;

	return isDate(year, month, day);
}

//
// Checks if the date range of the two dates is valid.
//
function isValidDateRange(fromDate, toDate){
	if (fromDate.getTime() > toDate.getTime()) {
		return false;
	}
	
	return true;
}

// 
// Checks that the date does not go beyond x days before today
//
function isDateMaxiumDays(year, month, day, totalDays){
	// check if the date is valid
	if(!isValidDate(year, month, day)){
		return false;
	}
	
	var dateNow = new Date();	
	var dateFrom = new Date(year, month - 1, day, 0, 0, 0, 0);
	var dayDiff = (dateNow - dateFrom)/1000/60/60/24;

	if (dayDiff > totalDays){
		return false;
	}

	return true;
}

//
// Sets the form fields to today
//
function setFormFieldsToToday(frm, yearField, monthField, dayField){
	var today = new Date();

	frm[monthField].value = today.getMonth() + 1;
	frm[dayField].value = today.getDate();
	frm[yearField].value = today.getYear();
}

//
// Clears the date form fields
//
function clearDateFields(frm, yearField, monthField, dayField){
	frm[monthField].value = "";
	frm[dayField].value = "";
	frm[yearField].value = "";
}

// Notify user that required field theField is empty.
// String s describes expected contents of theField.value.
// Put focus in theField and return false.

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



// Notify user that contents of field theField are invalid.
// String s describes expected contents of theField.value.
// Put select theField, pu focus in it, and return false.

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


/* FUNCTIONS TO INTERACTIVELY CHECK VARIOUS FIELDS. */

// checkString (TEXTFIELD theField, STRING s, [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is not all whitespace.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkString (theField, s, emptyOK)
{
    // Next line is needed on NN3 to avoid "undefined is not a number" error
    // in equality comparison below.
    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 checkStringWithoutAlert(theField,s,emptyOK)
{
       if(checkString.arguments.length==2)emptyOK=defaultEmptyOK;
       if((emptyOK==true)&&(isEmpty(theField,value)))return true;
       if(isWhitespace(theField.value))
           return false;
       else
          return true;
}

// checkNumber (TEXTFIELD theField, STRING s, [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is not all whitespace and
// is an integer >= 0.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkNumber (theField, s, emptyOK)
{

    // Next line is needed on NN3 to avoid "undefined is not a number" error
    // in equality comparison below.
    if (checkNumber.arguments.length == 2) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;

    theField.value = trim(theField.value);

    var normalizedNumber = stripCharsInBag(theField.value, ",");
    if (isWhitespace(normalizedNumber))
        return warnEmpty (theField, s);
    else if (!isNonnegativeInteger(normalizedNumber, false))
        return warnInvalid (theField, "The value you entered into the " + s + " field is invalid.\n Please enter an integer only.");
    else
        return true;
}



//F.L. begins, Aug 2,2001
function checkDigit(theField, s, emptyOK)
{

    //if (checkNumber.arguments.length == 2) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;

    theField.value = trim(theField.value);

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

        if(!isDigit(c))
           return warnInvalid (theField, "The value you entered into the " + s + " field is invalid.\n Please enter numbers only.");
    }


        return true;
}


function checkLetterDigit(theField, s, emptyOK)
{
    //if (checkNumber.arguments.length == 2) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;

    theField.value = trim(theField.value);
 
    for (i = 0; i < theField.value.length; i++)
    {
        // Check that current character is number or letter.
        var c =theField.value.charAt(i);

        if(!isDigit(c) && !isLetter(c))
           return warnInvalid (theField, "The value you entered into the " + s + " field is invalid.\n Please enter letters and numbers only.");
    }


        return true;
}

//F.L. ends, Aug 2,2001



// checkFloat (TEXTFIELD theField, STRING s, [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is not all whitespace and
// is a float >= 0.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkFloat (theField, s, emptyOK)
{
    // Next line is needed on NN3 to avoid "undefined is not a number" error
    // in equality comparison below.
    if (checkFloat.arguments.length == 2) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    var normalizedNumber = stripCharsInBag(theField.value, ",");
    if (isWhitespace(normalizedNumber))
        return warnEmpty (theField, s);
    else if (!isFloat(normalizedNumber, false))
        return warnInvalid (theField, "The value you entered into the " + s + " field is invalid.\n Please enter positive values only with no $ signs and no cents.");
    else
        return true;
}



// checkStateCode (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid U.S. state code.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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;
    }
}



// takes ZIPString, a string of 5 or 9 digits;
// if 9 digits, inserts separator hyphen

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



// takes ZIPString, a string of 6 digits;
// and inserts separator space

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



// checkZIPCode (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid ZIP code.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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 + PostalCodeDelimiters)
        if ( !(isZIPCode(normalizedZIP, false) || isPostalCode(normalizedZIP, false)) )
        {
            return warnInvalid (theField, iZIPCodex);
        }
        else
        {
            if (isZIPCode(normalizedZIP, false))
            {
                // if you don't want to insert a hyphen, comment next line out
                theField.value = reformatZIPCode(normalizedZIP);
            }
            else
            {
                theField.value = reformatPostalCode(normalizedZIP);
            }
            return true;
        }
    }
}

function testThis() { alert('TestThis'); }

function checkPostalCode (theField, emptyOK)
{
    if (checkPostalCode.arguments.length == 1)
    {
        emptyOK = defaultEmptyOK;
    }

    if ((emptyOK == true) && (isEmpty(theField.value)))
    {
        return true;
    }
    else
    {
        var normalizedPostal = stripCharsInBag(theField.value, PostalCodeDelimiters)
        if ( !isPostalCode(normalizedPostal, false))
        {
            return warnInvalid (theField, iPostalCode);
        }
        else
        {
            if (isPostalCode(normalizedPostal, false))
            {
                theField.value = reformatPostalCode(normalizedPostal);
            }
            return true;
        }
    }
}



// takes USPhone, a string of 10 digits
// and reformats as (123) 456-789

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



// checkUSPhone (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid US Phone.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkUSPhone (theField, emptyOK)
{
    if (checkUSPhone.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value)))
    {
        return true;
    }
    else
    {
        var normalizedPhone = stripCharsNotInBag(theField.value, digits)
        if (!isUSPhoneNumber(normalizedPhone, false))
        {
            return warnInvalid (theField, iUSPhone);
        }
        else
        {
            // if you don't want to reformat as (123) 456-789, comment next line out
            theField.value = reformatUSPhone(normalizedPhone)
            return true;
        }
    }
}

function checkPSTNumber(theField)
{

    if (isEmpty(theField.value))
    {
        return true;
    }
    else
    {
        if( !isPST(theField.value) )
        {
             return warnInvalid (theField, iPST);
        }
        else
        {
             return true;
        }
    }
}

function isPST (s)
{
    var i;

    if(s.length>16)
         return false;

    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);
        if ((!isDigit(c))&&(c!="-"))
               return false;
    }

    return true;
}

function reformatPST (s)
{
    var i;
    var returnString = "";

    for (i = 0; i < s.length; i++)
    {
            var c = s.charAt(i);
            returnString += c;
            if (i==3) returnString += pstDelimiter;
    }
    return returnString;
}


// checkInternationalPhone (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid International Phone.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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;
    }
}



// checkEmail (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid Email.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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;
}



// takes SSN, a string of 9 digits
// and reformats as 123-45-6789

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



// Check that string theField.value is a valid SSN.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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
        {  // if you don't want to reformats as 123-456-7890, comment next line out
            theField.value = reformatSSN(normalizedSSN)
            return true;
        }
    }
}



// Check that string theField.value is a valid Year or Year Short (2 digits).
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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


// Check that string theField.value is a valid Month.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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;
}



// Check that string theField.value is a valid Day.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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;
}



// Check that string theField.value is a valid Date.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkStrDate (theField, s, emptyOK)
{
    if (checkStrDate.arguments.length == 2) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;

	if ((theField.value.substring(2,3)!="/")||(theField.value.substring(5,6)!="/"))
		return warnInvalid (theField, "The value you entered into the " + s + " field is not a valid date. Please reenter it now.");
    var normalizedDate = stripCharsInBag(theField.value,DATEDelimiters);

    if (!isDate(normalizedDate.substring(4,8),normalizedDate.substring(0,2), normalizedDate.substring(2,4)))
       return warnInvalid (theField, "The value you entered into the " + s + " field is not a valid date. Please reenter it now.");
    else
        return true;
}

// Check that string theField.value is a valid Date in all kinds of forms allowed in the system.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkStrDateAll (theField, s, emptyOK)
{
	var strDate = theField.value;
	var strTemp;
	var strYear;
	var strMonth;
	var strDay;
	var pos;

	if ((pos=strDate.indexOf("/"))==-1){
		if (strDate.length==6){
			strMonth = strDate.substring(0,2);
			strDay = strDate.substring(2,4);
			strYear = strDate.substring(4,6);
		}
	} else {
		strMonth = strDate.substring(0,pos);
		strTemp =  strDate.substring(pos+1);
		if ((pos=strTemp.indexOf("/"))!=-1){
			strDay = strTemp.substring(0,pos);
			strYear = strTemp.substring(pos+1);
		}
	}
	if ((strYear!=null) && (strYear.length==2))
		strYear = "20" + strYear;
	if ((strMonth!=null) && (strMonth.length==1))
		strMonth = "0" + strMonth;
	if ((strDay!=null) && (strDay.length==1))
		strDay = "0" + strDay;

	if ( (strYear!=null) && (strMonth!=null) && (strDay!=null) ){
		strDate = strMonth + "/" + strDay + "/" + strYear;
		theField.value = strDate;
	}
	return checkStrDate(theField, s, emptyOK);
}

// Compare date1 against date2.
// Note: date1 and date2 have to be Date() instances.
// return
//	-1 if date1 < date2
//  0 if date1 == date2
//  1 if date1 > date2
function compareDates(date1, date2){
	if(date1.getTime() < date2.getTime())
		return -1;
	if(date1.getTime() == date2.getTime())
		return 0;
	if(date1.getTime() > date2.getTime())
		return 1;
}

function checkIfDateInTheFuture(theField, s, emptyOK){

	if (!checkStrDateAll (theField, s, emptyOK)){
		return false;
	}

	var strDate = theField.value;
    var strYear = strDate.substring(6);
	var strMonth = strDate.substring(0,2);
	var strDay = strDate.substring(3,5);

	if(compareDates(new Date(), new Date(strYear, strMonth -1 , strDay)) == -1){
		return warnInvalid (theField, "The value you entered into the " + s + " field represents a date in the future. Please reenter it now.");
	}

	return true;

}

// isHour (STRING s [, STRING ampm])
//
// isHour returns true if string s is a valid hour number between 1 and 12
//    AND 2nd argument is passed which is AM/PM
// isHour returns true if string s is a valid hour number between 1 and 24
//    AND with no 2nd argument.
//

function isHour(s, ampm)
{
    if (isEmpty(s))
    {
        alert(aHourEmpty);
        if (isHour.arguments.length == 1)
            return defaultEmptyOK;
        else
            return (isHour.arguments[1] == true);
    }

    if (isHour.arguments.length == 2)
        return isIntegerInRange(s, 1, 12);
    else
        return isIntegerInRange(s, 0, 23);
}



// isMinute (STRING s)
//
// isMinute returns true if string s is a valid hour number between 1 and 59
//

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

    return isIntegerInRange(s, 0, 59);
}
function isSecond(s)
{
    if (isEmpty(s))
    {
        if (isSecond.arguments.length == 1)
            return defaultEmptyOK;
        else
            return (isSecond.arguments[1] == true);
    }

    return isIntegerInRange(s, 0, 59);
}


// isTime (STRING h, STRING m,STRING s [, STRING ampm])
//
// isTime returns true if string s is a valid time.
//

function isTime(h, m, s, ampm)
{
    if (isTime.arguments.length == 4)
        return (  isHour(h,ampm) && isMinute(m) && isSecond(s) );
    else
        return (  isHour(h) && isMinute(m) && isSecond(s) );
}


// Removes all characters which appear in string bag from string s.

function formatTime (s)
{
    var i;
    var count=0;
    var hh="";
    var mm="";
    var ss="";
    var ps=s;
    var returnString = "";
    if(ps.length>8)ps=ps.substring(0,8);
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < ps.length; i++)
    {
        // Check that current character isn't whitespace.
        var c = ps.charAt(i);
        if (c == ':')
        	count=count+1;
        if(c!=':'){
        	if(count==0)
        	  hh += c;
        	if(count==1)
        	  mm+=c;
        	if(count==2)
        	  ss+=c;
       }

    }
    if(hh=="")hh="00";
    if(hh.length<2)hh='0'+hh;
    else
       hh=hh.substring(0,2);
    if(mm=="")mm="00";
    if(mm.length<2)mm='0'+mm;
    else
       mm=mm.substring(0,2);
    if(ss=="")ss="00";
    if(ss.length<2)ss='0'+ss;
    else
       ss=ss.substring(0,2);
    returnString=hh+':'+mm+':'+ss;

    return returnString;
}

// Check that string theField.value is a valid Time.
//
// The time has to be in format hh:mm to work.
//

function checkTime(theField, s, ampm, emptyOK)
{
    var hour = 0;
    var minute = 0;
    var second=0;
    if (checkTime.arguments.length == 3) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    theField.value=formatTime(theField.value);
    var normalizedTime = stripCharsInBag(theField.value, TIMEDelimiters);

    //if(normalizedTime.length==3||normalizedTime.length==5)normalizedTime='0'+normalizedTime;
    if(normalizedTime.length!=6)
        return warnInvalid (theField, "The value you entered into the " + s + " field is not a valid time. The Time should be in a 12 hour format. Please reenter it now.");
    if (normalizedTime.substring(0,1) == 0)
        hour = normalizedTime.substring(1,2);
    else
        hour = normalizedTime.substring(0,2);

    if (normalizedTime.substring(2,3) == 0)
        minute = normalizedTime.substring(3,4);
    else
        minute = normalizedTime.substring(2,4);
    if (normalizedTime.substring(4,5) == 0)
            second = normalizedTime.substring(5,6);
    else
        second = normalizedTime.substring(4,6);

    if (checkTime.arguments.length == 3)
    {
        if (!isTime(hour, minute, second, ampm))
            return warnInvalid (theField, "The value you entered into the " + s + " field is not a valid time. The Time should be in a 12 hour format. Please reenter it now.");
        else
            return true;
    }
    else
    {
        if (!isTime(normalizedTime.substring(0,2), normalizedTime.substring(2,4),normalizedTime.substring(4,6)))
            return warnInvalid (theField, "The value you entered into the " + s + " field is not a valid time. The Time should be in a 24 hours format. Please reenter it now.");
        else
            return true;
    }
}

// Check that string theField.value is a valid Duration.
//
// The time has to be in format dd:hh:mm to work.
//

function checkDuration(theField,s)
{
    var hour = 0;
    var minute = 0;
    var day=0;
    var tm=0;
    var tmps=theField.value;
	 var resultStr="";
    var normalizedTime = stripCharsInBag(tmps, TIMEDelimiters);
	if(!isInteger(normalizedTime))
		return warnInvalid (theField, "The value you entered into the " + s + " field is not a valid duration. Please reenter it now.");
   // Loop through entire string

	var j=0;
	var i=0;
	if(tmps.length>0){
		for ( i=0; i < tmps.length; i++)
		{
   		if ( (tmps.charAt(i) != ":") ){
     				resultStr+= tmps.charAt(i);
     				j=j+1;
     		}else{
     			break;
     		}



 	  } // end for loop  for day
 	day=parseInt(resultStr);
   	resultStr="";

   	tmps=tmps.substring(j+1,tmps.length);
  	if( j > 2 ) return warnInvalid (theField, "The value you entered into the " + s + " field is not a valid duration.\nThe number of days should not exceed 99, the number of hours should not exceed 23 and the number of seconds should not exceed 59.\n Please reenter it now.");
   	 j=0;
  	if(tmps.length>0){//if hour loop
  	for ( i=0; i < tmps.length; i++)
		{
   		if ( (tmps.charAt(i) != ":") ){
     				resultStr+= tmps.charAt(i);
     				j=j+1;
     		}else{
     			break;
     		}



   	} // end for loop  for hour
   	hour=parseInt (resultStr);
   	resultStr="";

  		tmps=tmps.substring(j+1,tmps.length);

	if( j > 2 || hour > 23 ) return warnInvalid (theField, aTheValueYouEntered + s + aDurationValueIsInvalid );
   	j=0;
	if ( tmps.length > 0 ) {//if minute loop
		for ( i=0; i < tmps.length; i++) {
   		if ( tmps.charAt(i) != ":"){
     				resultStr = resultStr + tmps.charAt(i);
     				j=j+1;
     		}else{
     			break;
     		}



   	} // end for loop  for minute

   	minute=parseInt (resultStr);
   	if(minute>59||resultStr.length>2)return warnInvalid (theField, aTheValueYouEntered + s + aDurationValueIsInvalid );

   	 	minute=minute+hour*60+day*3600;
    		if(minute<2){
    			return warnInvalid (theField, aTheValueYouEntered + s + aDurationValueIsTooShort );
    		}else{
      		return true;
      	}
     }else{
     	tm=hour*60+day*3600;
     	if(tm>2){
     		return true;
     	}else{
     		return warnInvalid (theField, aTheValueYouEntered + s + aDurationValueIsTooShort );
     	}
     }//end if minute loop
   }else{
   	tm=day*3600;
   	if(tm>2){
   		return true;
   	}else{
   		return warnInvalid (theField, aTheValueYouEntered + s + aDurationValueIsTooShort );
   	}
   }//end hour minute loop

 }else{
 	return warnInvalid (theField, aTheValueYouEntered + s + aDurationValueIsTooShort );
 }//end day if loop

}

// checkDate (yearField, monthField, dayField, STRING labelString [, OKtoOmitDay==false])
//
// Check that yearField.value, monthField.value, and dayField.value
// form a valid date.
//
// If they don't, labelString (the name of the date, like "Birth Date")
// is displayed to tell the user which date field is invalid.
//
// If it is OK for the day field to be empty, set optional argument
// OKtoOmitDay to true.  It defaults to false.

function checkDate (yearField, monthField, dayField, labelString, OKtoOmitDay)
{
    // Next line is needed on NN3 to avoid "undefined is not a number" error
    // in equality comparison below.
    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
}



// Get checked value from radio button.

function getRadioButtonValue (radio)
{
    for (var i = 0; i < radio.length; i++)
    {
        if (radio[i].checked) { break }
    }
    return radio[i].value
}



// Check that theField.value contains >= min characters and <= max character.

function checkLength (theField, s, min, max)
{
    if (!isEmpty(theField.value))
    {
        if ((theField.value.length < min) || (theField.value.length > max))
            return warnInvalid (theField, s +aCheckLengthNotLongEnough+aCheckLengthMustContainMoreThanXCharacters + min + aCheckLengthAndLessThanXCharacters + max + aCheckLengthCharacters );
        else
            return true;
    }
    else
        return warnInvalid (theField, s +aCheckLengthNotLongEnough+ aCheckLengthMustContainMoreThanXCharacters  + min + aCheckLengthAndLessThanXCharacters + max + aCheckLengthCharacters );
}

function checkThreePasswords (oldField, oldS, newField, newS, verifyField, verifyS, minLength, maxLength)
{
    if (isEmpty(oldField.value) && isEmpty(newField.value) && isEmpty(verifyField.value))
        return true;
    else
    {
        if(checkLength(oldField, oldS, minLength, maxLength))
        {
           if(checkLength(newField, newS, minLength, maxLength))
           {
               if(checkSameValues(newField, verifyField, newS, verifyS))
                  return true;
               else
                  return false;
           }
           else
               return false;
        }
        else
           return false;
    }
}



// Check that theField1.value equals theField2.value.

function checkSameValues (theField1, theField2, s1, s2)
{
    if (theField1.value != theField2.value)
        return warnInvalid (theField1, aCheckMatchTheValuesOf + s1 + aCheckMatchAnd + s2 + aCheckMatchDoNotMatch );
    else
        return true;
}



// Check that theField.value is not empty.

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

function isSelected(theField)
{
    if (isWhitespace(theField.options[theField.selectedIndex].value))
        return warnEmpty (theField, s);
    else
        return true;
}



// Check that at least one checkbox is checked.

function checkCheckboxValue (checkbox, s)
{
    var flag = false;

    for (var i = 0; i < checkbox.length; i++)
    {
        if (checkbox[i].checked)
        {
            flag = true;
            break;
        }
    }

    if (!flag)
    {
        alert( aCheckBoxAtLeastOne + s + aCheckBoxMustBeChecked );
        return false;
    }
    else
        return true;
}



// Validate credit card info.

function checkCreditCard (radio, theField)
{
    var cardType = getRadioButtonValue (radio)
    var normalizedCCN = stripCharsInBag(theField.value, creditCardDelimiters)
    if (!isCardMatch(cardType, normalizedCCN))
    {
        return warnInvalid (theField, iCreditCardPrefix + cardType + iCreditCardSuffix);
    }
    else
    {
        theField.value = normalizedCCN
        return true
    }
}



/*  ================================================================
    Credit card verification functions
    Originally included as Starter Application 1.0.0 in LivePayment.
    20 Feb 1997 modified by egk:
           changed naming convention to initial lowercase
                  (isMasterCard instead of IsMasterCard, etc.)
           changed isCC to isCreditCard
           retained functions named with older conventions from
                  LivePayment as stub functions for backward
                  compatibility only
           added "AMERICANEXPRESS" as equivalent of "AMEX"
                  for naming consistency
    ================================================================ */


/*  ================================================================
    FUNCTION:  isCreditCard(st)

    INPUT:     st - a string representing a credit card number

    RETURNS:  true, if the credit card number passes the Luhn Mod-10
		    test.
	      false, otherwise
    ================================================================ */

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--;
    }

    // Uncomment the following line to help create credit card numbers
    // 1. Create a dummy number with a 0 as the last digit
    // 2. Examine the sum written out
    // 3. Replace the last digit with the difference between the sum and
    //    the next multiple of 10.

    //  document.writeln("<BR>Sum      = ",sum,"<BR>");
    //  alert("Sum      = " + sum);

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

} // END FUNCTION isCreditCard()



/*  ================================================================
    FUNCTION:  isVisa()

    INPUT:     cc - a string representing a credit card number

    RETURNS:  true, if the credit card number is a valid VISA number.

	      false, otherwise

    Sample number: 4111 1111 1111 1111 (16 digits)
    ================================================================ */

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



/*  ================================================================
    FUNCTION:  isMasterCard()

    INPUT:     cc - a string representing a credit card number

    RETURNS:  true, if the credit card number is a valid MasterCard
		    number.

	      false, otherwise

    Sample number: 5500 0000 0000 0004 (16 digits)
    ================================================================ */

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;
} // END FUNCTION isMasterCard()



/*  ================================================================
    FUNCTION:  isAmericanExpress()

    INPUT:     cc - a string representing a credit card number

    RETURNS:  true, if the credit card number is a valid American
		    Express number.

	      false, otherwise

    Sample number: 340000000000009 (15 digits)
    ================================================================ */

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;
} // END FUNCTION isAmericanExpress()



/*  ================================================================
    FUNCTION:  isDinersClub()

    INPUT:     cc - a string representing a credit card number

    RETURNS:  true, if the credit card number is a valid Diner's
		    Club number.

	      false, otherwise

    Sample number: 30000000000004 (14 digits)
    ================================================================ */

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()

    INPUT:     cc - a string representing a credit card number

    RETURNS:  true, if the credit card number is a valid Carte
		    Blanche number.

	      false, otherwise
    ================================================================ */

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



/*  ================================================================
    FUNCTION:  isDiscover()

    INPUT:     cc - a string representing a credit card number

    RETURNS:  true, if the credit card number is a valid Discover
		    card number.

	      false, otherwise

    Sample number: 6011000000000004 (16 digits)
    ================================================================ */

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



/*  ================================================================
    FUNCTION:  isEnRoute()

    INPUT:     cc - a string representing a credit card number

    RETURNS:  true, if the credit card number is a valid enRoute
		    card number.

	      false, otherwise

    Sample number: 201400000000009 (15 digits)
    ================================================================ */

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



/*  ================================================================
    FUNCTION:  isJCB()

    INPUT:     cc - a string representing a credit card number

    RETURNS:  true, if the credit card number is a valid JCB
		    card number.

	      false, otherwise
    ================================================================ */

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;
} // END FUNCTION isJCB()



/*  ================================================================
    FUNCTION:  isAnyCard()

    INPUT:     cc - a string representing a credit card number

    RETURNS:  true, if the credit card number is any valid credit
		    card number for any of the accepted card types.

	      false, otherwise
    ================================================================ */

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



/*  ================================================================
    FUNCTION:  isCardMatch()

    INPUT:    cardType - a string representing the credit card type
	      cardNumber - a string representing a credit card number

    RETURNS:  true, if the credit card number is valid for the particular
	      credit card type given in "cardType".

	      false, otherwise
    ================================================================ */

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;
}  // END FUNCTION CardMatch()



/*  ================================================================
    The below stub functions are retained for backward compatibility
    with the original LivePayment code so that it should be possible
    in principle to swap in this new module as a replacement for the
    older module without breaking existing code.  (There are no
    guarantees, of course, but it should work.)

    When writing new code, do not use these stub functions; use the
    functions defined above.
    ================================================================ */

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);
}

function DateAdd(startDate, numDays, numMonths, numYears) {
	var returnDate = new Date(startDate.getTime());
	var yearsToAdd = numYears;

	var month = returnDate.getMonth() + numMonths;
	if (month > 11)	{
		yearsToAdd = Math.floor((month+1)/12);
		month -= 12*yearsToAdd;
		yearsToAdd += numYears;
	}
	returnDate.setMonth(month);
	returnDate.setFullYear(returnDate.getFullYear()	+ yearsToAdd);

	returnDate.setTime(returnDate.getTime()+60000*60*24*numDays);

	return returnDate;
}

function trim(theString) {
   return(rtrim(ltrim(theString)));
}

function ltrim(theString) {
  var i        = 0;
  var startPos = 0;
  var endPos   = theString.length;

  for (i = 0; i < theString.length; i++) {
     if (theString.substring(i, i + 1) != ' ') {
	    startPos = i;
		break;
     }
  }

  return theString.substring(startPos, endPos);
}

function rtrim(theString) {
  var i        = 0;
  var startPos = 0;
  var endPos   = theString.length;

  for (i = theString.length - 1; i >=0; i--) {
     if (theString.substring(i, i + 1) != ' ') {
	    endPos = i + 1;
		break;
	 }
  }

  return theString.substring(startPos, endPos);
}

// Checks that theField's length is less than maxlimit
// used to validate TEXTAREA field which doesn't have a maxlength attribute


function checkText(theField, maxlimit) {
    if (theField.value.length > maxlimit)     
      return warnInvalid (theField, "Please enter up to " + maxlimit + " characters.");
 	else
	  return true;
}

function containsWhiteSpace(theField, s) {
    var i;
    var theText = theField.value;
    
    if (isEmpty(theText)) {
       warnInvalid(theField, s);
       return true;
    }    

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

        if (whitespace.indexOf(c) == 0) {
           warnInvalid(theField, s);
           return true;
        }    
            
    }

    return false;	
}

function selectAllCheckBoxes(checkBoxes, trigger) {
	var i = 0;
        
        if (typeof checkBoxes == 'undefined' || typeof trigger == 'undefined')
           return;

	if (trigger.checked) {	 
		if (checkBoxes.length)
		  for (i = 0; i < checkBoxes.length; i++)
			 checkBoxes[i].checked = true;
		else
		  checkBoxes.checked = true;		
	}
	else {
		if (checkBoxes.length)
		  for (i = 0; i < checkBoxes.length; i++)
			 checkBoxes[i].checked = false;
		else
		  checkBoxes.checked = false;		   
	}		  
}

function atLeastOneChecked(checkBoxes) {
	var i = 0;
	
        if (typeof checkBoxes == 'undefined')
           return false;
	
	if (checkBoxes.length) {
	  for (i = 0; i < checkBoxes.length; i++) {
	     if (checkBoxes[i].checked == true) {
	        return true;
	     }   
	  }      
	}        
	else {
	  if (checkBoxes.checked == true) {
	     return true;
	  }   
	}
	     
	return false;		

}

function createProvinceStateDropDown(selectBox) {

      selectBox.length = 65;

      selectBox.options[0].text = "";
      selectBox.options[0].value = "";
      selectBox.options[1].text = "Alberta";
      selectBox.options[1].value = "AB";
      selectBox.options[2].text = "British Columbia";
      selectBox.options[2].value = "BC";
      selectBox.options[3].text = "Manitoba";
      selectBox.options[3].value = "MB";
      selectBox.options[4].text = "New Brunswick";
      selectBox.options[4].value = "NB";
      selectBox.options[5].text = "Newfoundland";
      selectBox.options[5].value = "NF";
      selectBox.options[6].text = "Northwest Territories";
      selectBox.options[6].value = "NT";
      selectBox.options[7].text = "Nova Scotia";
      selectBox.options[7].value = "NS";
      selectBox.options[8].text = "Nunavut";
      selectBox.options[8].value = "NU";
      selectBox.options[9].text = "Ontario";
      selectBox.options[9].value = "ON";
      selectBox.options[10].text = "Prince Edward Island";
      selectBox.options[10].value = "PE";
      selectBox.options[11].text = "Quebec";
      selectBox.options[11].value = "QC";
      selectBox.options[12].text = "Saskatchewan";
      selectBox.options[12].value = "SK";
      selectBox.options[13].text = "Yukon Territory";
      selectBox.options[13].value = "YT";

      selectBox.options[14].text = "Alabama";
      selectBox.options[14].value = "AL";
      selectBox.options[15].text = "Alaska";
      selectBox.options[15].value = "AK";
      selectBox.options[16].text = "Arizona";
      selectBox.options[16].value = "AZ";
      selectBox.options[17].text = "Arkansas";
      selectBox.options[17].value = "AR";
      selectBox.options[18].text = "California";
      selectBox.options[18].value = "CA";
      selectBox.options[19].text = "Colorado";
      selectBox.options[19].value = "CO";
      selectBox.options[20].text = "Connecticut";
      selectBox.options[20].value = "CT";
      selectBox.options[21].text = "D.C.";
      selectBox.options[21].value = "DC";
      selectBox.options[22].text = "Delaware";
      selectBox.options[22].value = "DE";
      selectBox.options[23].text = "Florida";
      selectBox.options[23].value = "FL";
      selectBox.options[24].text = "Georgia";
      selectBox.options[24].value = "GA";
      selectBox.options[25].text = "Hawaii";
      selectBox.options[25].value = "HI";
      selectBox.options[26].text = "Idaho";
      selectBox.options[26].value = "ID";
      selectBox.options[27].text = "Illinois";
      selectBox.options[27].value = "IL";
      selectBox.options[28].text = "Indiana";
      selectBox.options[28].value = "IN";
      selectBox.options[29].text = "Iowa";
      selectBox.options[29].value = "IA";
      selectBox.options[30].text = "Kansas";
      selectBox.options[30].value = "KS";
      selectBox.options[31].text = "Kentucky";
      selectBox.options[31].value = "KY";
      selectBox.options[32].text = "Louisiana";
      selectBox.options[32].value = "LA";
      selectBox.options[33].text = "Maine";
      selectBox.options[33].value = "ME";
      selectBox.options[34].text = "Maryland";
      selectBox.options[34].value = "MD";
      selectBox.options[35].text = "Massachusetts";
      selectBox.options[35].value = "MA";
      selectBox.options[36].text = "Michigan";
      selectBox.options[36].value = "MI";
      selectBox.options[37].text = "Minnesota";
      selectBox.options[37].value = "MN";
      selectBox.options[38].text = "Mississippi";
      selectBox.options[38].value = "MS";
      selectBox.options[39].text = "Missouri";
      selectBox.options[39].value = "MO";
      selectBox.options[40].text = "Montana";
      selectBox.options[40].value = "MT";
      selectBox.options[41].text = "Nebraska";
      selectBox.options[41].value = "NE";
      selectBox.options[42].text = "Nevada";
      selectBox.options[42].value = "NV";
      selectBox.options[43].text = "New Hampshire";
      selectBox.options[43].value = "NH";
      selectBox.options[44].text = "New Jersey";
      selectBox.options[44].value = "NJ";
      selectBox.options[45].text = "New Mexico";
      selectBox.options[45].value = "NM";
      selectBox.options[46].text = "New York";
      selectBox.options[46].value = "NY";
      selectBox.options[47].text = "North Carolina";
      selectBox.options[47].value = "NC";
      selectBox.options[48].text = "North Dakota";
      selectBox.options[48].value = "ND";
      selectBox.options[49].text = "Ohio";
      selectBox.options[49].value = "OH";
      selectBox.options[50].text = "Oklahoma";
      selectBox.options[50].value = "OK";
      selectBox.options[51].text = "Oregon";
      selectBox.options[51].value = "OR";
      selectBox.options[52].text = "Pennsylvania";
      selectBox.options[52].value = "PA";
      selectBox.options[53].text = "Rhode Island";
      selectBox.options[53].value = "RI";
      selectBox.options[54].text = "South Carolina";
      selectBox.options[54].value = "SC";
      selectBox.options[55].text = "South Dakota";
      selectBox.options[55].value = "SD";
      selectBox.options[56].text = "Tennessee";
      selectBox.options[56].value = "TN";
      selectBox.options[57].text = "Texas";
      selectBox.options[57].value = "TX";
      selectBox.options[58].text = "Utah";
      selectBox.options[58].value = "UT";
      selectBox.options[59].text = "Vermont";
      selectBox.options[59].value = "VT";
      selectBox.options[60].text = "Virginia";
      selectBox.options[60].value = "VA";
      selectBox.options[61].text = "Washington";
      selectBox.options[61].value = "WA";
      selectBox.options[62].text = "West Virginia";
      selectBox.options[62].value = "WV";
      selectBox.options[63].text = "Wisconsin";
      selectBox.options[63].value = "WI";
      selectBox.options[64].text = "Wyoming";
      selectBox.options[64].value = "WY";
}