// formValidation.js
var ipasswd = "The passwords do not match."
var ppasswd = "Must fill in password field."

var digits = "0123456789";
var lowercaseLetters = "abcdefghijklmnopqrstuvwxyz"
var uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

var whitespace = " \t\n\r";
var decimalPointDelimiter = "."
var phoneNumberDelimiters = "()- ";
var USCurrency = "$";
var validUSPhoneChars = digits + phoneNumberDelimiters;
var validWorldPhoneChars = digits + phoneNumberDelimiters + "+";
var digitsInUSPhoneNumber = 10;
var ZIPCodeDelimiters = "-";
var ZIPCodeDelimeter = "-"
var validZIPCodeChars = digits + ZIPCodeDelimiters
var digitsInZIPCode1 = 5
var digitsInZIPCode2 = 9
var mPrefix = "You did not enter a value into the "
var mSuffix = " field. This is a required field. Please enter it now."
var sFullName = "Full Name"
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 sEmail = "Email"
var sOtherInfo = "Other Information"
var iStateCode = "This field must be a valid two character U.S. state abbreviation (like CA for California). Please reenter it now."
var iZIPCode = "This field must be a 5 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 iEmail = "This field must be a valid email address (like user@domain.com). 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."
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 pEmail = "valid email address (like foo@bar.com)."
var pDay = "day number between 1 and 31."
var pMonth = "month number between 1 and 12."
var pYear = "2 or 4 digit year number."
var defaultEmptyOK = false

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

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

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

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

function isWhitespace (s)
{   var i;
    if (isEmpty(s)) return true;
    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);

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

function stripCharsInBag (s, bag)

{   var i;
    var returnString = "";

    // 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;
}


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

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

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

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

function stripInitialWhitespace (s)
{   var i = 0;

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

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

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

// 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))}

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;
}

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))
    }
}


function isPositiveInteger (s)
{   var secondArg = defaultEmptyOK;

    if (isPositiveInteger.arguments.length > 1)
        secondArg = isPositiveInteger.arguments[1];
    return (isSignedInteger(s, secondArg)
         && ( (isEmpty(s) && secondArg)  || (parseInt (s) > 0) ) );
}


function isNonnegativeInteger (s)
{   var secondArg = defaultEmptyOK;

    if (isNonnegativeInteger.arguments.length > 1)
        secondArg = isNonnegativeInteger.arguments[1];
    return (isSignedInteger(s, secondArg)
         && ( (isEmpty(s) && secondArg)  || (parseInt (s) >= 0) ) );
}


function isNegativeInteger (s)
{   var secondArg = defaultEmptyOK;

    if (isNegativeInteger.arguments.length > 1)
        secondArg = isNegativeInteger.arguments[1];
    return (isSignedInteger(s, secondArg)
         && ( (isEmpty(s) && secondArg)  || (parseInt (s) < 0) ) );
}


function isNonpositiveInteger (s)
{   var secondArg = defaultEmptyOK;

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

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


function isFloat (s)
{   var i;
    var seenDecimalPoint = false;

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

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

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


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

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

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

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

function isAlphabetic (s)
{   var i;

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

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

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

function isAlphanumeric (s)
{   var i;

    if (isEmpty(s))
       if (isAlphanumeric.arguments.length == 1) return defaultEmptyOK;
       else return (isAlphanumeric.arguments[1] == true);
    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);

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

function reformat (s){
	var arg;
    var sPos = 0;
    var resultString = "";

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

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

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

function isStateCode(s){
	if (isEmpty(s)){
		if (isStateCode.arguments.length == 1) return defaultEmptyOK;
    else return (isStateCode.arguments[1] == true);
	}
	return ( (s.length==2) && (USStateCodes.indexOf(s) != -1) && (s.indexOf(USStateCodeDelimiter) == -1) )
}

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 = 1;
    var sLength = s.length;

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

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

    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;
}

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

function isIntegerInRange (s, a, b){
	if (isEmpty(s))
       if (isIntegerInRange.arguments.length == 1) return defaultEmptyOK;
       else return (isIntegerInRange.arguments[1] == true);
    if (!isInteger(s, false)) return false;
    var num = parseInt (s);
    return ((num >= a) && (num <= b));
}

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

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


function daysInFebruary (year){  return (  ((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0) ) ) ? 29 : 28 ); }
function isDate (year, month, day){
    if (! (isYear(year, false) && isMonth(month, false) && isDay(day, false))) return false;

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

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

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

    return true;
}

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

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

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

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

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

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

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

function 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;
      }
    }
}

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

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

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

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

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

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

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

function getRadioButtonValue (radio){
	for (var i = 0; i < radio.length; i++){if (radio[i].checked) return radio[i].value }
	return -1;
}

function checkCompare(val1, val2){
if (!(val1.value.length >= 1)) return warnInvalid(val1, ppasswd);
else
	{ if (!(val2.value.length >= 1)) return warnInvalid(val2, ppasswd);
	else{
		if (val1.value != val2.value) return warnInvalid(val1, ipasswd);
		else 	{ return true; }
		}
	}
}

function checkPay(theField, emptyOK){
	if (checkPay.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else{
      if (isPositiveInteger(theField.value) && (isFloat(theField.value) || isInt(theField.value)))
				return true;
      else  return warnInvalid (theField, 'Invalid pay.');
    }
}

function error(e,msg){e.style.backgroundColor='#FF8877';alert(msg)}

function validate(e,min,max){
	//alert("a")
    if(e == null){error(e, 'The ' + e.name + ' field is empty.'); return false }
    else if(e.value.length < min){error(e, 'The ' + e.name + ' field has too few characters.');return false}
	else if(e.value.length > max){error(e,'The ' + e.name + ' field has too many characters.');return false}
	else if(e.value.match(/[?<=>%]/)){error(e,'The ' + e.name + ' field has invalid characters.');return false}
	else return true;
}

function checkInt(e,min,max){
	if(isFloat(e)){error(e,'This field is not a valid number.');return false}
	else if(e<min){error(e,'This number is too low.');return false}
	else if(e>max){error(e,'This number is too high.');return false}
	else return true;
}

function alphaonly(){
	//alert(event.keyCode)
	if(event.keyCode <= 13) return event.keyCode
	if((event.keyCode < 65 || event.keyCode >90 ) && (event.keyCode < 97 || event.keyCode >122))return false
}

function floatonly(){
	if(this.value.indexOf('.')>=0 && event.keyCode==46) return false
	else if(event.keyCode!=46 && event.keyCode!=13 && (event.keyCode < 48 || event.keyCode > 57))return false
}
function numericonly(){
	//alert(event.keyCode)
	if(event.keyCode <= 13) return event.keyCode
	if(event.keyCode!=13 && (event.keyCode < 48 || event.keyCode > 57)) return false
}

function numericonly1(){
//	alert(event.keyCode)
//9=backspace 9=tab 16=shift 17=ctrl 18=alt 20=CAP
//	if((event.keyCode == 8) || (event.keyCode == 9) || (event.keyCode == 16) || (event.keyCode == 18) || (event.keyCode == 17)) return false
	if(event.keyCode <= 20 || event.keyCode >= 112) return false;
//48-57
	else{
		if((event.keyCode > 57) || (event.keyCode<48)) { alert('This field only accepts numeric data'); return false}
	}
}
//document.all.size.onkeypress=numericonly