{* $Id: check_cc_number_script.tpl,v 1.5 2003/04/28 10:46:37 svowl Exp $ *}
{literal}
<script language="JavaScript1.2">



function isSwitchSolo(cardType, cardNbr) {

var result    = false;

var switchRules  = new Array("490302,490309,18,1","490335,490339,18,1","491101,491102,16,1","491174,491182,18,1","493600,493699,19,1","564182,564182,16,2","633300,633300,16,0","633301,633301,19,1","633302,633349,16,0","675900,675900,16,0","675901,675901,19,1","675902,675904,16,0","675905,675905,19,1","675906,675917,16,0","675918,675918,19,1","675919,675937,16,0","675938,675940,18,1","675941,675949,16,0","675950,675962,19,1","675963,675997,16,0","675998,675998,19,1","675999,675999,16,0");
var soloRules    = new Array("633450,633453,16,0","633454,633457,16,0","633458,633460,16,0","633461,633461,18,1","633462,633472,16,0","633473,633473,18,1","633474,633475,16,0","633476,633476,19,1","633477,633477,16,0","633478,633478,18,1","633479,633480,16,0","633481,633481,19,1","633482,633489,16,0","633490,633493,16,1","633494,633494,18,1","633495,633497,16,2","633498,633498,19,1","633499,633499,18,1","676700,676700,16,0","676701,676701,19,1","676702,676702,16,0","676703,676703,18,1","676704,676704,16,0","676705,676705,19,1","676706,676707,16,2","676708,676711,16,0","676712,676715,16,0","676716,676717,16,0","676718,676718,19,1","676719,676739,16,0","676740,676740,18,1","676741,676749,16,0","676750,676762,19,1","676763,676769,16,0","676770,676770,19,1","676771,676773,16,0","676774,676774,18,1","676775,676778,16,0","676779,676779,18,1","676780,676781,16,0","676782,676782,18,1","676783,676794,16,0","676795,676795,18,1","676796,676797,16,0","676798,676798,19,1","676799,676799,16,0");

    switch(cardType) {
       case "SO": thisRules = soloRules;
                   break;
       case "SW": thisRules = switchRules;
                   break;
       default  : thisRules = new Array();
                   break;
    }
   
    var ndx;
    var ruleDetails;
    var done = false; 
    for(ndx = 0 ; ndx < thisRules.length && !done ; ++ndx) {
        thisRule    = thisRules[ndx];
        ruleDetails = thisRule.split(",");
        
        var hiPrefix        = ruleDetails[0];
        var loPrefix        = ruleDetails[1];
        var valLength       = ruleDetails[2];
        var issueLength     = ruleDetails[3];
        var startDateLength = ruleDetails[4];

        var cardPrefix = cardNbr.substr(0,hiPrefix.length);
        if(cardPrefix >= hiPrefix && cardPrefix <= loPrefix) {
            if(cardNbr.length == valLength) {
                result = true;
                done   = true;
            }
        }
    }

	return(result);
}

/*
* This function cheks the checksum of CreditCard
* @param cc - the string with credit card number
* @param accepted - the array of allowed CC types
* if(accepted==null) { all CC types are allowed }
*/

function isCreditCard(cc,accepted) {

  cc=String(cc);
  if(cc.length<4 || cc.length>30) return false; 

  // Start the Mod10 checksum process...
  var checksum=0;

  // Add even digits in even length strings or odd digits in odd length strings.
  for (var location=1-(cc.length%2); location<cc.length; location+=2) {
    var digit=parseInt(cc.substring(location,location+1));
    if(isNaN(digit)) return false; 
    checksum+=digit;
  }

  // Analyze odd digits in even length strings 
  // or even digits in odd length strings.
  for (var location=(cc.length%2); location<cc.length; location+=2) {
    var digit=parseInt(cc.substring(location,location+1));
    if(isNaN(digit)) return false;
    if(digit<5) checksum+=digit*2;
    else checksum+=digit*2-9;
  }

  if(checksum%10!=0) return false;

  if(accepted!=null) {
    var checkPresent = false;
    var accepted_array = new Array("Diners Club","American Express","JCB","Diners Club","American Express","Diners Club","Carte Blanche","Visa","MasterCard","Australian BankCard","Discover/Novus","Switch","Solo");

    for (var i in accepted_array) {
		if(accepted[0] == accepted_array[i]) 
			checkPresent = true;
	}

    var type="not";
	var accept=false;

    if(checkPresent == true) {
      var t=parseInt(cc.substring(0,4)), l=cc.length;
      
      if(t>=3000 && t<3060 && l==14) type="Diners Club";
      else if(isSwitchSolo("SW",cc.substring(0, cc.length))) type="Switch";
	  else if(isSwitchSolo("SO",cc.substring(0, cc.length))) type="Solo"; 
      else if(t>=3400 && t<3500 && l==15) type="American Express";
      else if(t>=3528 && t<3590 && l==16) type="JCB";
      else if(t>=3600 && t<3700 && l==14) type="Diners Club";
      else if(t>=3700 && t<3800 && l==15) type="American Express";
      else if(t>=3800 && t<3890 && l==14) type="Diners Club";
      else if(t>=3890 && t<3900 && l==14) type="Carte Blanche";
      else if(t>=4000 && t<5000 && (l==13 || l==16)) type="Visa";
      else if(t>=5100 && t<5600 && l==16) type="MasterCard";
      else if(t==5610 && l==16) type="Australian BankCard";
      else if(t==6011 && l==16) type="Discover/Novus";
	  else type="not";	// accepted and recognized types are not equal
    }
	else { 
	  // we don't know this card's type so pass it as correct
	  return true;
	}

	if (accepted[0]==type)  accept=true;
	else accept = false;
	
	return accept;
  }
  
  return true;
}


function checkCCNumber(field_cc,field_accepted) {
{/literal}
  var card_types=new Array();
  {section name=card_type loop=$card_types}
    card_types["{$card_types[card_type].code}"]="{$card_types[card_type].type}";
  {/section}
{literal}
  var cc=field_cc.value;
  var accepted=null;
  if(field_accepted!=null) {
    accepted=new Array(card_types[field_accepted.value]);
  }
  if (isCreditCard(cc,accepted)) {
    return true;
  } else {
{/literal}
	alert("{$lng.txt_cc_number_invalid}");
{literal}
	field_cc.focus();
	field_cc.select();
	return false;
  }
}

/*
* This function checks CVV2 field 
*/

function checkCVV2(cvv2,cc) {
{/literal}
  var card_cvv2=new Array();
  {section name=card_type loop=$card_types}
    card_cvv2["{$card_types[card_type].code}"]="{$card_types[card_type].cvv2}";
  {/section}

 {literal}
  var num=cc.value;

if (card_cvv2[num]=='')
  	return true; 
  cvv2 = cvv2.value;	
  cvv2 = String(cvv2);	

  if(cvv2.length==0) {
    alert("CVV2 is empty");
    return false;
  }
  if(cvv2.length!=3 && cvv2.length!=4) {
    alert("CVV2 isn't correct");
    return false;
  }

  for (var location=0; location<cvv2.length; location++) {
    var digit=parseInt(cvv2.substring(location,location+1));
	
    if(isNaN(digit)) {
	  alert("CVV2 must be a number");
	  return false;
	}
  }

{/literal}  
  return true;
{literal}  
}

/*
* This function checks expiration CC date
*/

function checkExpirationDate(expiration_date) {
  ed = expiration_date.value;
  ed = String(ed);

  for (var location=0; location<ed.length; location++) {
    var digit=parseInt(ed.substring(location,location+1));
    if(isNaN(digit)) {
	  alert("Date must be a number");
	  return false;
  }
  
  }
  if(ed.length !=4) {
    alert("Expiration date's format isn't correct");
    return false;
  }	

  mm=ed.substring(0,2);
  if(mm<"01" || mm>"12") {
    alert("Month of expiration date isn't correct");
    return false;
  }
  yy=ed.substring(2,4);
  // need to change "03" to variable

  if(yy<"03") {
    alert("Is this card expired?");
    return false;
  }
  return true;
}

</script>
{/literal}