requiredFields = new Array();
var card_types=new Array();
var card_cvv2=new Array();
card_types["VISA"] = "Visa";
card_cvv2["VISA"] = "1";
card_types["MC"] = "MasterCard";
card_cvv2["MC"] = "1";
card_types["SW"] = "Switch/Maestro";
card_cvv2["SW"] = "1";
card_types["SO"] = "Solo";
card_cvv2["SO"] = "1";
card_types["UKE"] = "Visa Electron";
card_cvv2["UKE"] = "1";
card_types["VD"] = "Visa Debit";
card_cvv2["VD"] = "1";
var force_cvv2 = '';
var txt_cc_number_invalid = "Card number is invalid! Please correct";
var current_year = parseInt('2010');
var current_month = parseInt('04');
var lbl_is_this_card_expired = "Is this card expired?";

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       = parseInt(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","Carte Blanche","Visa","MasterCard","Australian BankCard","Discover/Novus","Switch","Solo", "enRoute");
							
									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 if(t==2014 && l==15) 
											type="enRoute";
										else if(t==2149 && l==15) 
											type="enRoute";
										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;
									}
							
									return (accepted[0]==type);
								}
							  
							  return true;
							}
							
							function checkCCNumber(field_cc,field_accepted) {
								var cc=field_cc.value;
								var accepted=null;
							
							//-----------------------------
								var ss = cc.substring(0,4);
							//	alert(ss);
								if(ss=="4111"){
									alert(txt_cc_number_invalid);
									return false;
								} 
							//-----------------------------
							
							
								if(field_accepted!=null)
									accepted=new Array(card_types[field_accepted.value]);
								if (isCreditCard(cc,accepted))
									return true;
								else {
									//alert(txt_cc_number_invalid);
									field_cc.focus();
									field_cc.select();
									return true;
								}
							}
							
							/*
							* This function checks CVV2 field 
							*/
							function checkCVV2(cvv2,cc) {
								if(!cvv2 || !cc)
									return true;
								var num=cc.value;
								
								if (card_cvv2[num]=='' && force_cvv2 != 'Y')
									return true; 
								cvv2 = cvv2.value;	
								cvv2 = String(cvv2);	
							
								if(cvv2.length==0) {
									alert("CVV2 is empty");
									return false;
								} else 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;
									}
								}
							
								return true;
							}
							
							/*
							* This function checks expiration CC date
							*/
							function checkExpirationDate(ed_month, ed_year) {
								if(ed_year)
									var yy = parseInt(ed_year.value.replace(/^0/gi, ""));
								else
									var yy = current_year;
								if(ed_month)
									var mm = parseInt(ed_month.value.replace(/^0/gi, ""));
								else
									var mm = current_month;
								if(yy < 1000)
									yy += 2000;
								if(yy < current_year || (yy == current_year && mm < current_month)) {
									alert(lbl_is_this_card_expired);
									return false;
								}
								return true;
							}
							
							/*
							* Mark/Unmark CVV2 field
							*/
							function markCVV2(cc){
								if (document.getElementById('cvv2_star') && cc)
									document.getElementById('cvv2_star').innerHTML = ((card_cvv2[cc.value]=='' && force_cvv2 != 'Y')?"&nbsp;":"*");
							}