<!-- Original:  Simon Tneoh (tneohcb@pc.jaring.my) -->

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!-- Begin
var Cards = new makeArray(8);
Cards[0] = new CardType("MasterCard", "51,52,53,54,55", "16");
var MasterCard = Cards[0];
Cards[1] = new CardType("VisaCard", "4", "13,16");
var VisaCard = Cards[1];
Cards[2] = new CardType("AmExCard", "34,37", "15");
var AmExCard = Cards[2];
Cards[3] = new CardType("DinersClubCard", "30,36,38", "14");
var DinersClubCard = Cards[3];
Cards[4] = new CardType("DiscoverCard", "6011", "16");
var DiscoverCard = Cards[4];
Cards[5] = new CardType("enRouteCard", "2014,2149", "15");
var enRouteCard = Cards[5];
Cards[6] = new CardType("JCBCard", "3088,3096,3112,3158,3337,3528", "16");
var JCBCard = Cards[6];
var LuhnCheckSum = Cards[7] = new CardType();

/*************************************************************************\
CheckCardNumber(form)
function called when users click the "check" button.
\*************************************************************************/
function CheckCardNumber(form) {

//alert(form);
//alert(document.form.confermatermini.checked);	

//alert(document.form.nome.value);
	
var nome = document.form.nome.value;
if ((nome == "") || (nome == "undefined")) {
           alert("Inserire il cognome e il nome di almeno uno dei viaggiatori.");
           document.form.nome.focus();
           return false;
        }
		
var email = document.form.email.value;
var email_reg_exp = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-]{2,})+\.)+([a-zA-Z0-9]{2,})+$/;
if (!email_reg_exp.test(email) || (email == "") || (email == "undefined")) {
           alert("Inserire un indirizzo email corretto.");
           document.form.email.focus();
           return false;
        }
		
var ripetiemail = document.form.ripetiemail.value;
var email_reg_exp = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-]{2,})+\.)+([a-zA-Z0-9]{2,})+$/;
if (!email_reg_exp.test(ripetiemail) || (ripetiemail == "") || (ripetiemail == "undefined")) {
           alert("Ripetere l'indirizzo email corretto.");
           document.form.ripetiemail.focus();
           return false;
        }
		
if (email != ripetiemail) {
           alert("L'email inserita non è corretta.");
           document.form.ripetiemail.value = "";
           document.form.ripetiemail.focus();
           return false;
	   }
	   
var id3 = document.form.id3.value;
if ((id3 == "") || (id3 == "undefined")) {
           alert("Inserire il giorno di arrivo.");
           document.form.id3.focus();
           return false;
        }
	   
var id4 = document.form.id4.value;
if ((id4 == "") || (id4 == "undefined")) {
           alert("Inserire il giorno di partenza.");
           document.form.id4.focus();
           return false;
        }
		
var notti = document.form.notti.value;
if ((isNaN(notti)) || (notti == "") || (notti == "undefined")) {
           alert("Inserire il numero di notti.");
           document.form.notti.focus();
           return false;
        }

var telefono = document.form.telefono.value;
if ((telefono == "") || (telefono == "undefined")) {
           alert("Inserire il numero di telefono.");
           document.form.telefono.focus();
           return false;
        }
		
var orario = document.form.orario.selectedIndex;
if ((orario == "") || (orario == "undefined")) {
          alert("Inserire l'orario di arrivo previsto.");
           document.form.orario.focus();
           return false;
        }
		
var tipocamera = document.form.tipocamera.value;
if ((tipocamera == "") || (tipocamera == "undefined")) {
           alert("Inserire il numero e la tipologia di camere che si vogliono prenotare.");
           document.form.tipocamera.focus();
           return false;
        }
		
var adulti = document.form.adulti.value;
if ((adulti == "") || (adulti == "undefined")) {
           alert("Inserire il numero di adulti.");
           document.form.adulti.focus();
           return false;
        }
		
var titolare = document.form.titolare.value;
if ((titolare == "") || (titolare == "undefined")) {
           alert("Inserire il nome e il cognome del titolare della carta.");
           document.form.titolare.focus();
           return false;
        }

if (document.form.confermatermini.checked == false) {
           alert("Accettare i termini indicati");
           document.form.confermatermini.focus();
           return false;	
	}

	
// da qui controllo i dati della carta	
	
var tmpyear;
if (document.form.CardNumber.value.length == 0) {
	alert("Inserire il numero di una carta di credito.");
	document.form.CardNumber.focus();
return false;
}



if (document.form.ExpYear.value.length == 0) {
	alert("Inserire l'anno di scadenza della carta.");
	document.form.ExpYear.focus();
return false;
}

if (document.form.ExpYear.value > 96)
tmpyear = "19" + document.form.ExpYear.value;
else if (document.form.ExpYear.value < 21)
tmpyear = "20" + document.form.ExpYear.value;
else {
alert("L'anno di scadenza della carta non è valido.");
return false;
}
tmpmonth = document.form.ExpMon.options[document.form.ExpMon.selectedIndex].value;
// The following line doesn't work in IE3, you need to change it
// to something like "(new CardType())...".
// if (!CardType().isExpiryDate(tmpyear, tmpmonth)) {
if (!(new CardType()).isExpiryDate(tmpyear, tmpmonth)) {
alert("Questa carta è già scaduta.");
return false;
}
card = document.form.CardType.options[document.form.CardType.selectedIndex].value;
var retval = eval(card + ".checkCardNumber(\"" + document.form.CardNumber.value +
"\", " + tmpyear + ", " + tmpmonth + ");");
cardname = "";


if (retval) 

{
//ahah_remove('send');
//document.form.action = "https://www.pensioni-roma.com/Roma/prenota.asp?send=ok";
//document.form.action = "prenota.asp";
//document.form.submit();
}

//document.getElementById('form').submit();
//alert("This card has already expired.");

// comment this out if used on an order form 




else {
// The cardnumber has the valid luhn checksum, but we want to know which
// cardtype it belongs to.
for (var n = 0; n < Cards.size; n++) {
if (Cards[n].checkCardNumber(document.form.CardNumber.value, tmpyear, tmpmonth)) {
cardname = Cards[n].getCardType();
break;
   }
}
if (cardname.length > 0) {
alert("Questo sembra il numero di una carta " + cardname + " , non di una carta " + card + " number.");
	return false;
}
else {
alert("Questa carta di credito non è valida.");
	return false;
      }
   }
   
	vaitop('supertop');
   
}

/*************************************************************************\
Object CardType([String cardtype, String rules, String len, int year, 
                                        int month])
cardtype    : type of card, eg: MasterCard, Visa, etc.
rules       : rules of the cardnumber, eg: "4", "6011", "34,37".
len         : valid length of cardnumber, eg: "16,19", "13,16".
year        : year of expiry date.
month       : month of expiry date.
eg:
var VisaCard = new CardType("Visa", "4", "16");
var AmExCard = new CardType("AmEx", "34,37", "15");
\*************************************************************************/
function CardType() {
var n;
var argv = CardType.arguments;
var argc = CardType.arguments.length;

this.objname = "object CardType";

var tmpcardtype = (argc > 0) ? argv[0] : "CardObject";
var tmprules = (argc > 1) ? argv[1] : "0,1,2,3,4,5,6,7,8,9";
var tmplen = (argc > 2) ? argv[2] : "13,14,15,16,19";

this.setCardNumber = setCardNumber;  // set CardNumber method.
this.setCardType = setCardType;  // setCardType method.
this.setLen = setLen;  // setLen method.
this.setRules = setRules;  // setRules method.
this.setExpiryDate = setExpiryDate;  // setExpiryDate method.

this.setCardType(tmpcardtype);
this.setLen(tmplen);
this.setRules(tmprules);
if (argc > 4)
this.setExpiryDate(argv[3], argv[4]);

this.checkCardNumber = checkCardNumber;  // checkCardNumber method.
this.getExpiryDate = getExpiryDate;  // getExpiryDate method.
this.getCardType = getCardType;  // getCardType method.
this.isCardNumber = isCardNumber;  // isCardNumber method.
this.isExpiryDate = isExpiryDate;  // isExpiryDate method.
this.luhnCheck = luhnCheck;// luhnCheck method.
return this;
}

/*************************************************************************\
boolean checkCardNumber([String cardnumber, int year, int month])
return true if cardnumber pass the luhncheck and the expiry date is
valid, else return false.
\*************************************************************************/
function checkCardNumber() {
var argv = checkCardNumber.arguments;
var argc = checkCardNumber.arguments.length;
var cardnumber = (argc > 0) ? argv[0] : this.cardnumber;
var year = (argc > 1) ? argv[1] : this.year;
var month = (argc > 2) ? argv[2] : this.month;

this.setCardNumber(cardnumber);
this.setExpiryDate(year, month);

if (!this.isCardNumber())
return false;
if (!this.isExpiryDate())
return false;

return true;
// hidediv('pulsantesend');
}
/*************************************************************************\
String getCardType()
return the cardtype.
\*************************************************************************/
function getCardType() {
return this.cardtype;
}
/*************************************************************************\
String getExpiryDate()
return the expiry date.
\*************************************************************************/
function getExpiryDate() {
return this.month + "/" + this.year;
}
/*************************************************************************\
boolean isCardNumber([String cardnumber])
return true if cardnumber pass the luhncheck and the rules, else return
false.
\*************************************************************************/
function isCardNumber() {
var argv = isCardNumber.arguments;
var argc = isCardNumber.arguments.length;
var cardnumber = (argc > 0) ? argv[0] : this.cardnumber;
if (!this.luhnCheck())
return false;

for (var n = 0; n < this.len.size; n++)
if (cardnumber.toString().length == this.len[n]) {
for (var m = 0; m < this.rules.size; m++) {
var headdigit = cardnumber.substring(0, this.rules[m].toString().length);
if (headdigit == this.rules[m])
return true;
}
return false;
}
return false;
}

/*************************************************************************\
boolean isExpiryDate([int year, int month])
return true if the date is a valid expiry date,
else return false.
\*************************************************************************/
function isExpiryDate() {
var argv = isExpiryDate.arguments;
var argc = isExpiryDate.arguments.length;

year = argc > 0 ? argv[0] : this.year;
month = argc > 1 ? argv[1] : this.month;

if (!isNum(year+""))
return false;
if (!isNum(month+""))
return false;
today = new Date();
expiry = new Date(year, month);
if (today.getTime() > expiry.getTime())
return false;
else
return true;
}

/*************************************************************************\
boolean isNum(String argvalue)
return true if argvalue contains only numeric characters,
else return false.
\*************************************************************************/
function isNum(argvalue) {
argvalue = argvalue.toString();

if (argvalue.length == 0)
return false;

for (var n = 0; n < argvalue.length; n++)
if (argvalue.substring(n, n+1) < "0" || argvalue.substring(n, n+1) > "9")
return false;

return true;
}

/*************************************************************************\
boolean luhnCheck([String CardNumber])
return true if CardNumber pass the luhn check else return false.
Reference: http://www.ling.nwu.edu/~sburke/pub/luhn_lib.pl
\*************************************************************************/
function luhnCheck() {
var argv = luhnCheck.arguments;
var argc = luhnCheck.arguments.length;

var CardNumber = argc > 0 ? argv[0] : this.cardnumber;

if (! isNum(CardNumber)) {
return false;
  }

var no_digit = CardNumber.length;
var oddoeven = no_digit & 1;
var sum = 0;

for (var count = 0; count < no_digit; count++) {
var digit = parseInt(CardNumber.charAt(count));
if (!((count & 1) ^ oddoeven)) {
digit *= 2;
if (digit > 9)
digit -= 9;
}
sum += digit;
}
if (sum % 10 == 0)
return true;
else
return false;
}

/*************************************************************************\
ArrayObject makeArray(int size)
return the array object in the size specified.
\*************************************************************************/
function makeArray(size) {
this.size = size;
return this;
}

/*************************************************************************\
CardType setCardNumber(cardnumber)
return the CardType object.
\*************************************************************************/
function setCardNumber(cardnumber) {
this.cardnumber = cardnumber;
return this;
}

/*************************************************************************\
CardType setCardType(cardtype)
return the CardType object.
\*************************************************************************/
function setCardType(cardtype) {
this.cardtype = cardtype;
return this;
}

/*************************************************************************\
CardType setExpiryDate(year, month)
return the CardType object.
\*************************************************************************/
function setExpiryDate(year, month) {
this.year = year;
this.month = month;
return this;
}

/*************************************************************************\
CardType setLen(len)
return the CardType object.
\*************************************************************************/
function setLen(len) {
// Create the len array.
if (len.length == 0 || len == null)
len = "13,14,15,16,19";

var tmplen = len;
n = 1;
while (tmplen.indexOf(",") != -1) {
tmplen = tmplen.substring(tmplen.indexOf(",") + 1, tmplen.length);
n++;
}
this.len = new makeArray(n);
n = 0;
while (len.indexOf(",") != -1) {
var tmpstr = len.substring(0, len.indexOf(","));
this.len[n] = tmpstr;
len = len.substring(len.indexOf(",") + 1, len.length);
n++;
}
this.len[n] = len;
return this;
}

/*************************************************************************\
CardType setRules()
return the CardType object.
\*************************************************************************/
function setRules(rules) {
// Create the rules array.
if (rules.length == 0 || rules == null)
rules = "0,1,2,3,4,5,6,7,8,9";
  
var tmprules = rules;
n = 1;
while (tmprules.indexOf(",") != -1) {
tmprules = tmprules.substring(tmprules.indexOf(",") + 1, tmprules.length);
n++;
}
this.rules = new makeArray(n);
n = 0;
while (rules.indexOf(",") != -1) {
var tmpstr = rules.substring(0, rules.indexOf(","));
this.rules[n] = tmpstr;
rules = rules.substring(rules.indexOf(",") + 1, rules.length);
n++;
}
this.rules[n] = rules;
return this;
}
//  End -->