<!--
<!-- hide this script from non-javascript-enabled browsers

/**
 * (c) Copyright 2008, 2009 Summer Hill Software Solutions, Inc.  All Rights Reserved.
 * 
 *                           Summer Hill Software Solutions, Inc.
 *                           Larkspur, CO 80118 U.S.A.
 * 
 * This is private, confidential, and propritary property of Summer Hill Software Solutions, Inc.
 * This property may not be distributed in any form without the express written consent
 * of an officer of Summer Hill Software Solutions, Inc.
 * 
 * Copyright:   Copyright (c) 2008, 2009
 * Company:     Summer Hill Software Solutions, Inc.
 * @version 1.0
 *
 */

// 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 = "()- ";

// 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 = "- ";

// 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;

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

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

// 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

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

// CONSTANT STRING DECLARATIONS
// (grouped for ease of translation and localization)

// m is an abbreviation for "missing"
var mPrefix = "You did not enter a value into the "
var mSuffix = " field. This is a required field. Please enter it now."

// s is an abbreviation for "string"
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 sEventStart = "Event Start Date"
var sEventEnd = "Event End Date"
var sEntryDeadline = "Entry Deadline"

// i is an abbreviation for "invalid"
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 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 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."

// p is an abbreviation for "prompt"
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 = "4 digit year number."

// Global variable defaultEmptyOK defines default return value
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.

var daysInMonth = new Array (12);
daysInMonth[0] = 31;
daysInMonth[1] = 29;   // must programmatically check this
daysInMonth[2] = 31;
daysInMonth[3] = 30;
daysInMonth[4] = 31;
daysInMonth[5] = 30;
daysInMonth[6] = 31;
daysInMonth[7] = 31;
daysInMonth[8] = 30;
daysInMonth[9] = 31;
daysInMonth[10] = 30;
daysInMonth[11] = 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;
   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;
   }

   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:
//
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).
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.
//
// 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.
// 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];

   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];

   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];

   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];

   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));
   }
}

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

   var startPos = 0;
   var secondArg = defaultEmptyOK;

   if (isNonNegativeFloat.arguments.length > 1) {
      secondArg = isNonNegativeFloat.arguments[1];
   }

   if (s.charAt(0) == "-" || s.charAt(0) == "0") return false;
   if (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;
    }

    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 ... )
//
// 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)
//
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);
   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)));
}

// 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) );
}

// 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);

   // is s whitespace?
   if (isWhitespace(s)) return false;

   // there must be >= 1 character before @, so we
   // start looking at character position 1
   // (i.e. second character)
   var i = 1;
   var sLength = s.length;

   // look for @
   while ((i < sLength) && (s.charAt(i) != "@")) { i++ }

   if ((i >= sLength) || (s.charAt(i) != "@")) return false;
   else i += 2;

   // look for .
   while ((i < sLength) && (s.charAt(i) != ".")) { i++ }

   // there must be at least one character after the .
   if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
   else return true;
}

// isYear (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;
   return (s.length == 4);
}

// 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;

   // 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-1]) return false;

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

   return true;
}

/* FUNCTIONS TO NOTIFY USER OF INPUT REQUIREMENTS OR MISTAKES. */

// Display prompt string s in status bar.
function prompt (s) { window.status = s }

// Display data entry prompt string s in status bar.
function promptEntry (s) { window.status = pEntryPrompt + s }

// 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;
}

// 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, "-", 4));
}

// 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)
      if (!isZIPCode(normalizedZIP, false)) return warnInvalid (theField, iZIPCode);
      else {
         // if you don't want to insert a hyphen, comment next line out
         theField.value = reformatZIPCode(normalizedZIP)
         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 = stripCharsInBag(theField.value, phoneNumberDelimiters)
      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;
      }
   }
}

// 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.
//
// 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;
}

// 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;
}

// 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
}

// 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
    ================================================================ */
/*  ================================================================
    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);
}

//-->