requiredFields = new Array();

 	function checkRequired(id) {

 	var errors = new Array();
 	var cnt, x, id_element, true_id;
 		if(!requiredFields)
 			return true;
 		if(requiredFields.length == 0)
 			return true;
 		if(id != '' && id != undefined) {
 			for(x = 0; x < requiredFields.length; x++)
 				if(requiredFields[x][0] == id)
 					id_element = requiredFields[x];
 			true_id = ((id_element[2] && document.getElementById("_"+id))?"_":"")+id;
 			if(document.getElementById(true_id))
 				if(document.getElementById(true_id).value == '' && (document.getElementById(true_id).type == 'text' || document.getElementById(true_id).type == 'password'))
 					errors[0] = id_element;
 		} else {
 			cnt = 0;
 			for(x = 0; x < requiredFields.length; x++) {
 				true_id = ((requiredFields[x][2] && document.getElementById("_"+requiredFields[x][0]))?"_":"")+requiredFields[x][0];
 				if(document.getElementById(true_id))
 					if(document.getElementById(true_id).value == '' && (document.getElementById(true_id).type == 'text' || document.getElementById(true_id).type == 'password'))
 						errors[cnt++] = requiredFields[x];
 			}
 		}
 		if(errors.length == 0)
 			return true;
 		alert("The required field '"+errors[0][1]+"' is empty!");
 		if(document.getElementById(errors[0][0]))
 			document.getElementById(errors[0][0]).focus();
 		return false;
 	}

 	var cctypes=new Array();
 	var cvm=new Array();
 	cctypes["VISA"] = "Visa";
 	cvm["VISA"] = "1";
 	cctypes["MC"] = "MasterCard";
 	cvm["MC"] = "1";
 	cctypes["AMEX"] = "American Express";
 	cvm["AMEX"] = "1";
 	cctypes["DICL"] = "Diners Club";
 	cvm["DICL"] = "";
 	cctypes["JCB"] = "JCB";
 	cvm["JCB"] = "";
 	cctypes["CARTE"] = "Carte Blanche";
 	cvm["CARTE"] = "";
 	cctypes["ABC"] = "Australian BankCard";
 	cvm["ABC"] = "";
 	cctypes["DINO"] = "Discover/Novus";
 	cvm["DINO"] = "";
 	cctypes["SW"] = "Switch";
 	cvm["SW"] = "";
 	cctypes["SO"] = "Solo";
 	cvm["SO"] = "";
 	cctypes["ERT"] = "enRoute";
 	cvm["ERT"] = "";
 	var txt_cc_number_invalid = "Credit Card information is invalid! Please enter valid Credit Card Information";
 	var current_year = parseInt('2008');
 	var current_month = parseInt('10');


 	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;
 	}
 	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";
 			} 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,cardholder) {
 		var cc=field_cc.value;
 		var accepted=null;

 		if(cardholder.value==""){
 			alert("Please Enter a card holder name");
 			cardholder.focus();
 			return false;
 		}
 		if(field_accepted!=null)
 		    accepted=new Array(cctypes[field_accepted.value]);
 		if (isCreditCard(cc,accepted))
 	    	return true;
 	  	else {
 			alert(txt_cc_number_invalid);
 			field_cc.focus();
 			field_cc.select();
 			return false;
 		}
 	}

 	/*
 	* This function checks CVV2 field
 	*/
 	function checkCVV2(cvv2,cc) {
 		if(!cvv2 || !cc)
 			return true;
 		var num=cc.value;

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

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

 	function checkExpirationDate(ed_month, ed_year) {
 		var yy = parseInt(ed_year.value);
 		var mm = parseInt(ed_month.value);
 		if(yy < 1000)
 			yy += 2000;
 		if(yy < current_year || (yy == current_year && mm < current_month)) {
 			alert("Is this card expired?");
 			return false;
 		}
 		return true;
 	}

 	function validateFloat(obj, nLength, nPrecision){
 		var strVal = new String(obj.value);
 		var nIndexOfDot = strVal.indexOf('.');
 		var nValidLength = nIndexOfDot==-1?strVal.length:strVal.length+1
 		if(nValidLength<strVal.length){
 			alert('Maximum length can be '+nLength);
 			strVal = strVal.substring(0,nValidLength);
 		}
 		if(strVal.charAt(strVal.length-1)!='.' || nIndexOfDot!=(strVal.length-1)){
 			if(isNaN(parseFloat(strVal))){
 				strVal='0';
 			}
 				obj.value=parseFloat(strVal);
 		}
 		if(-1!=nIndexOfDot && strVal.substring(nIndexOfDot+1).length>nPrecision){
 			strVal=strVal.substring(0, strVal.length-1);
 		obj.value=strVal;
 		}
 	}
    function chkShipping(formnm)
    {
    if(document.getElementById('chkSameShipping').checked == false)
        {
        formnm=eval(formnm);
        for(var i=0;i<formnm.elements.length;i++)
        {
        if(formnm.elements[i].attributes.getNamedItem("alt")){
        var altval=formnm.elements[i].attributes.getNamedItem("alt").value;
        var altval1=altval.split("~DM~");
        if(altval1[0]=="SBC" && RemoveLTSpace(formnm.elements[i].value)=="")
            {
            formnm.elements[i].value=RemoveLTSpace(formnm.elements[i].value);
            alert("Please enter "+altval1[1]);
            formnm.elements[i].focus();
            return false;
            }
         }
       }
         return true;
       }
       else
       {
       return true;
       }
    }
    function call_for_submit(checkfrm)
    {
        if(!JSvalid_form(checkfrm))
            return false;
        if(!chkShipping(checkfrm))
            return false;
        else if(!checkCCNumber(document.getElementById('cardnumber'),document.getElementById('cctype'),document.getElementById('bname')))
            return false;
        else if(!checkExpirationDate(document.getElementById('expmonth'),document.getElementById('expyear')))
            return false;
        else if(!checkCVV2(document.getElementById('cvm'),document.getElementById('cctype')))
            return false;      
        else
            return true;
    }