// the following is the credit card check part
/*============================================================================*/

/*

This routine checks the credit card number. The following checks are made:

1. A number has been provided
2. The number is a right length for the card
3. The number has an appropriate prefix for the card
4. The number has a valid modulus 10 number check digit if required

If the validation fails an error is reported.

The structure of credit card formats was gleaned from a variety of sources on 
the web.

Parameters:
            cardnumber           number on the card
            cardname             name of card as defined in the card list below

Author:     John Gardner
Date:       1st November 2003
Updated:    26th Feb. 2005      Additional cards added by request

*/

/*
   If a credit card number is invalid, an error reason is loaded into the 
   global ccErrorNo variable. This can be be used to index into the global error  
   string array to report the reason to the user if required:
   
   e.g. if (!checkCreditCard (number, name) alert (ccErrors(ccErrorNo);
*/

var ccErrorNo = 0;
var ccErrors = new Array ()

ccErrors [0] = "Unknown card type";
ccErrors [1] = "No card number provided";
ccErrors [2] = "Credit card number is in invalid format";
ccErrors [3] = "Credit card number is invalid";
ccErrors [4] = "Credit card number has an inappropriate number of digits";

function checkCreditCard (cardnumber, cardname) {

     
  // Array to hold the permitted card characteristics
  var cards = new Array();

  // Define the cards we support. You may add addtional card types.
  
  //  Name:      As in the selection box of the form - must be same as user's
  //  Length:    List of possible valid lengths of the card number for the card
  //  prefixes:  List of possible prefixes for the card
  //  checkdigit Boolean to say whether there is a check digit
  
  cards [0] = {name: "Visa", 
               length: "13,16", 
               prefixes: "4",
               checkdigit: true};
  cards [1] = {name: "MasterCard", 
               length: "16", 
               prefixes: "51,52,53,54,55",
               checkdigit: true};
  cards [2] = {name: "DinersClub", 
               length: "14,", 
               prefixes: "300,301,302,303,304,305,36,38",
               checkdigit: true};
  cards [3] = {name: "CarteBlanche", 
               length: "14", 
               prefixes: "300,301,302,303,304,305,36,38",
               checkdigit: true};
  cards [4] = {name: "AmEx", 
               length: "15", 
               prefixes: "34,37",
               checkdigit: true};
  cards [5] = {name: "Discover", 
               length: "16", 
               prefixes: "6011",
               checkdigit: true};
  cards [6] = {name: "JCB", 
               length: "15,16", 
               prefixes: "3,1800,2131",
               checkdigit: true};
  cards [7] = {name: "Enroute", 
               length: "15", 
               prefixes: "2014,2149",
               checkdigit: true};
               
  // Establish card type
  var cardType = -1;
  for (var i=0; i<cards.length; i++) {

    // See if it is this card (ignoring the case of the string)
    if (cardname.toLowerCase () == cards[i].name.toLowerCase()) {
      cardType = i;
      break;
    }
  }
  
  // If card type not found, report an error
  if (cardType == -1) {
     ccErrorNo = 0;
     return false; 
  }
   
  // Ensure that the user has provided a credit card number
  if (cardnumber.length == 0)  {
     ccErrorNo = 1;
     return false; 
  }
  
  // Check that the number is numeric, although we do permit a space to occur  
  // every four digits. 
  var cardNo = cardnumber
  var cardexp = /^([0-9]{4})\s?([0-9]{4})\s?([0-9]{4})\s?([0-9]{1,4})$/;
  if (!cardexp.exec(cardNo))  {
     ccErrorNo = 2;
     return false; 
  }
    
  // Now remove any spaces from the credit card number
  cardexp.exec(cardNo);
  cardNo = RegExp.$1 + RegExp.$2 + RegExp.$3 + RegExp.$4;
       
  // Now check the modulus 10 check digit - if required
  if (cards[cardType].checkdigit) {
    var checksum = 0;                                  // running checksum total
    var mychar = "";                                   // next char to process
    var j = 1;                                         // takes value of 1 or 2
  
    // Process each digit one by one starting at the right
    var calc;
    for (i = cardNo.length - 1; i >= 0; i--) {
    
      // Extract the next digit and multiply by 1 or 2 on alternative digits.
      calc = Number(cardNo.charAt(i)) * j;
    
      // If the result is in two digits add 1 to the checksum total
      if (calc > 9) {
        checksum = checksum + 1;
        calc = calc - 10;
      }
    
      // Add the units element to the checksum total
      checksum = checksum + calc;
    
      // Switch the value of j
      if (j ==1) {j = 2} else {j = 1};
    } 
  
    // All done - if checksum is divisible by 10, it is a valid modulus 10.
    // If not, report an error.
    if (checksum % 10 != 0)  {
     ccErrorNo = 3;
     return false; 
    }
  }  

  // The following are the card-specific checks we undertake.
  var LengthValid = false;
  var PrefixValid = false; 
  var undefined; 

  // We use these for holding the valid lengths and prefixes of a card type
  var prefix = new Array ();
  var lengths = new Array ();
    
  // Load an array with the valid prefixes for this card
  prefix = cards[cardType].prefixes.split(",");
      
  // Now see if any of them match what we have in the card number
  for (i=0; i<prefix.length; i++) {
    var exp = new RegExp ("^" + prefix[i]);
    if (exp.test (cardNo)) PrefixValid = true;
  }
      
  // If it isn't a valid prefix there's no point at looking at the length
  if (!PrefixValid) {
     ccErrorNo = 3;
     return false; 
  }
    
  // See if the length is valid for this card
  lengths = cards[cardType].length.split(",");
  for (j=0; j<lengths.length; j++) {
    if (cardNo.length == lengths[j]) LengthValid = true;
  }
  
  // See if all is OK by seeing if the length was valid. We only check the 
  // length if all else was hunky dory.
  if (!LengthValid) {
     ccErrorNo = 4;
     return false; 
  };   
  
  // The credit card is in the required format.
  return true;
}

/*============================================================================*/



// client side form validation script
function getLabelForId(id) {
 var label, labels = document.getElementsByTagName('label');
 for (var i = 0; (label = labels[i]); i++) {
   if (label.htmlFor == id) {
	 return label;
   }
 }
 return false;
}

// function to strip non numbers
function stripNonNumbers (InString)  {
   OutString="";
   for (Count=0; Count < InString.length; Count++)  {
      TempChar=InString.substring (Count, Count+1);
      Strip = false;
      CharString="0123456789";
      for (Countx = 0; Countx < CharString.length; Countx++) {
         StripThis = CharString.substring(Countx, Countx+1)
         if (TempChar == StripThis) {
            Strip = true;
            break;
         }
      }
      if (Strip)
      OutString=OutString+TempChar;
   }
    return (OutString);
}

function checkCourseNumber(id) {
 var formfield = document.getElementById(id);
 var label = getLabelForId(id);
 var pattern = "^\\d\\d\\d\\.\\d\\d\\d$";
 var regex = new RegExp(pattern);
 if ((formfield.value.length == 0) || (!regex.exec(formfield.value))) {
   label.className = 'problem';
   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
   //document.getElementById(id).className = 'formerror';
 } 
 else {
   label.className = 'completed';
   // formfield.style.backgroundColor = "#FFFFFF";
   Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   document.getElementById(id).className = 'form';
 }
}

function checkCourseNumberOpt(id) {
 var formfield = document.getElementById(id);
 var label = getLabelForId(id);
 var pattern = "^\\d\\d\\d\\.\\d\\d\\d$";
 var regex = new RegExp(pattern);
 if ((!formfield.value.length == 0) && (!regex.exec(formfield.value))) {
   label.className = 'problem';
   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
   //document.getElementById(id).className = 'formerror';
 } 
 else {
   label.className = 'completed';
   // formfield.style.backgroundColor = "#FFFFFF";
   Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   document.getElementById(id).className = 'form';
 }
}

function checkDateYear(id) {
 var formfield = document.getElementById(id);
 var label = getLabelForId(id);
 var pattern = "^[1-2][0-9]{3}$";
 var regex = new RegExp(pattern);
 if ((formfield.value.length == 0) || (!regex.exec(formfield.value))) {
   label.className = 'problem';
   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
   //document.getElementById(id).className = 'formerror';
 } 
 else {
   label.className = 'completed';
   // formfield.style.backgroundColor = "#FFFFFF";
   Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   document.getElementById(id).className = 'form';
 }
}

function checkSSNLast4(id) {
 var formfield = document.getElementById(id);
 var label = getLabelForId(id);
 var pattern = "^\\d\\d\\d\\d$";
 var regex = new RegExp(pattern);
 if ((formfield.value.length == 0) || (!regex.exec(formfield.value))) {
   label.className = 'problem';
   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
   //document.getElementById(id).className = 'formerror';
 } 
 else {
   label.className = 'completed';
   // formfield.style.backgroundColor = "#FFFFFF";
   Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   document.getElementById(id).className = 'form';
 }
}

function checkRequired(id,depon,reqif) {
 var formfield = document.getElementById(id);
 var dependson = document.getElementById(depon);	
 var label = getLabelForId(id);
 var pattern = "^([a-zA-Z0-9`~!@#\\$%\\^&\\*\\(\\)\\-_\\+=\\{\\}\\[\\]\\|\\\\':;/\\?,\\.\"\\s])*$";
 var regex = new RegExp(pattern);
 if ((formfield.value.length == 0) || (!regex.exec(formfield.value))) { 
   label.className = 'problem';
   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
   //document.getElementById(id).className = 'formerror';
 } else {
   label.className = 'completed';
   formfield.style.backgroundColor = "#FFFFFF";
   //Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   document.getElementById(id).className = 'form';
 }
}

function checkOptionalRequired(id) {
 var formfield = document.getElementById(id);
 var label = getLabelForId(id);
 var pattern = "^([a-zA-Z0-9`~!@#\\$%\\^&\\*\\(\\)\\-_\\+=\\{\\}\\[\\]\\|\\\\':;/\\?,\\.\"\\s])*$";
 var regex = new RegExp(pattern);
 if (formfield.value.length == 0) {
   formfield.style.backgroundColor = "#FFFFFF";
   // Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   document.getElementById(id).className = 'form'; 
 }
 else if (regex.exec(formfield.value)) {
   label.className = 'completed';
   // formfield.style.backgroundColor = "#FFFFFF";
   Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   document.getElementById(id).className = 'form';
 }
 else if ((formfield.value.length != 0) || (!regex.exec(formfield.value))) {
   label.className = 'problem';
   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
   //document.getElementById(id).className = 'formerror';
 } 
}

function checkRequiredFile(id) {
 var formfield = document.getElementById(id);
 var label = getLabelForId(id);
 if (formfield.value.length == 0) {
   label.className = 'problem';
   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
//   alert ("Please enter your information");
 } else {
   label.className = 'completed';
   Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   document.getElementById(id).className = 'form';
 }
}


function checkRequiredCheckbox(f,id) {
 var label = getLabelForId(id);
if(document.forms[f][id].checked){
	label.className = 'completed';
	//formfield.style.backgroundColor = "#FFFFFF";
	Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
	document.getElementById(id).className = 'form';
} else {
	label.className = 'problem';
	Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
}

}

function checkRequiredEmail(id) {
 var formfield = document.getElementById(id);
 var label = getLabelForId(id);
 var emailReg = "^[\+'_a-z0-9-]+(\.[\+'_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*\.(([a-z]{2,4})|(aero|coop|info|museum|name))$";
 var regex = new RegExp(emailReg);
 
 if (!regex.exec(formfield.value)) {
   label.className = 'problem';
   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
 } else {
   label.className = 'completed';
   formfield.style.backgroundColor = "#FFFFFF";
   //Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   document.getElementById(id).className = 'form';  
 }
}

function checkRequiredDropdown(id) {
 var formfield = document.getElementById(id);
 var label = getLabelForId(id);
 var error = "";
 
 if (formfield.selectedIndex == 0) {
   label.className = 'problem';
   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
//   alert ("Please select a choice from the dropdown");
 } else {
   label.className = 'completed';
   formfield.style.backgroundColor = "#FFFFFF";
   //Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   document.getElementById(id).className = 'form';
 }
}

function checkRequiredNumeric(id) {
 //  strip all non numeric characters and validate if numeric
 var formfield = document.getElementById(id);
 var label = getLabelForId(id);
 ret = stripNonNumbers(formfield.value);
 if (ret.length) {
	label.className = 'completed';
   	formfield.style.backgroundColor = "#FFFFFF";
//   	Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
    document.getElementById(id).className = 'form';	
 } else {
	label.className = 'problem';
	Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
 }
}

function checkRequiredCC(id) {
 //  strip all non numeric characters and validate if numeric and length of valid credit card
 var formfield = document.getElementById(id);
 var label = getLabelForId(id);
 ret = stripNonNumbers(formfield.value);
// if ((ret.length != 16) || (!ret.length)) {
 if (checkCreditCard (formfield.value,document.getElementById('cardtype').value)) {
	label.className = 'completed';
	formfield.style.backgroundColor = "#FFFFFF";
   	//Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
    document.getElementById(id).className = 'form';
 } else {
	label.className = 'problem';
	Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
//	alert (ccErrors[ccErrorNo]);
 }
}

// DHTML phone number validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()-. ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 9;

var ssnDelimiters = "- ";
var validSSNChars = ssnDelimiters + "+";

function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    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 checkInternationalPhone(strPhone){
	s=stripCharsInBag(strPhone,validWorldPhoneChars);
	return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

function checkSSN(id){
	var formfield = document.getElementById(id);
	var label = getLabelForId(id);

	s=stripCharsInBag(formfield.value, validSSNChars);
	if ((formfield.value != "") && !(isInteger(s) && s.length == 9)) {
		label.className = 'problem';
   	    Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
		return false;		
	}
	else {
		label.className = 'completed';
   	Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   	document.getElementById(id).className = 'form';	
		return true;
	}
 }

function checkSSNReqd(id){
	var formfield = document.getElementById(id);
	var label = getLabelForId(id);

	s=stripCharsInBag(formfield.value, validSSNChars);
	if (!(isInteger(s) && s.length == 9)) {
		label.className = 'problem';
   	    Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
		return false;		
	}
	else {
		label.className = 'completed';
   	Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   	document.getElementById(id).className = 'form';	
		return true;
	}
 }

function checkRequiredPhone(id){
	var formfield = document.getElementById(id);
	var label = getLabelForId(id);
	 
	if ((formfield.value==null)||(formfield.value=="")){
		label.className = 'problem';
   		Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
		return false
	}
	if (checkInternationalPhone(formfield.value)==false){
		label.className = 'problem';
   		Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
		return false
	}
	else {
		label.className = 'completed';
   		Fat.fade_element(id, 60, 300, '#ffd3d3', '#FFFFFF');
   		document.getElementById(id).className = 'form';	
		return true
	}
 }
 
 // The following javascript is use by the checkdate function below to validate dates to make sure they are in the MM/DD/YY format.
/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    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++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

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 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		return false
	}
return true
}

function ValidateForm(){
	var dt=document.frmSample.txtDate
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	}
    return true
 }
 
 
function checkDOB(id) {
	 var formfield = document.getElementById(id);
	 var label = getLabelForId(id);
	 var dateReg = "^[0-1]?[0-9]/[0-3]?[0-9]/[1-2][0-9]{3}$";
	 var regex = new RegExp(dateReg);
	 
	 var splitDate = formfield.value.split("/");
	 
	 var t = new Date();
	 
	 if (regex.exec(formfield.value) && isDate(formfield.value) && ((t.getFullYear()-splitDate[2])>15)) {
	   label.className = 'completed';
	   formfield.style.backgroundColor = "#FFFFFF";
	 } else {
	   label.className = 'problem';
	   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
	 }
}
 
 
function checkDate(id) {
	 var formfield = document.getElementById(id);
	 var label = getLabelForId(id);
	 var dateReg = "^[0-1]?[0-9]/[0-3]?[0-9]/[1-2][0-9]{3}$";
	 var regex = new RegExp(dateReg);
	 
	 var splitDate = formfield.value.split("/");
	 
	 var t = new Date();
	 
	 if (regex.exec(formfield.value) && isDate(formfield.value)) {
	   label.className = 'completed';
	   formfield.style.backgroundColor = "#FFFFFF";
	 } else {
	   label.className = 'problem';
	   Fat.fade_element(id, 60, 300, '#FFFFFF', '#ffd3d3');
	 }
}