function LuhnCheck(str){

  var result = true;



  var sum = 0; 

  var mul = 1; 

  var strLen = str.length;

  

  for (i = 0; i < strLen; i++){

    var digit = str.substring(strLen-i-1,strLen-i);

    var tproduct = parseInt(digit ,10)*mul;

    if (tproduct >= 10)

      sum += (tproduct % 10) + 1;

    else

      sum += tproduct;

    if (mul == 1)

      mul++;

    else

      mul--;

  }

  if ((sum % 10) != 0)

    result = false;

    

  return result;

}





function validateCCNum(cardNum){

	var result = false;
	var cardLen = cardNum.length;
	var firstdig = cardNum.substring(0,1);
	var seconddig = cardNum.substring(1,2);
	var first2digs = cardNum.substring(0,2);
	var first3digs = cardNum.substring(0,3);
	var first4digs = cardNum.substring(0,4);

	//cascade validation
	//source: http://en.wikipedia.org/wiki/Credit_card_number
	for(i=0; i<9; i++){
		switch(i){
			case 0: //American Express 34 and 37 15 
				result = (cardLen == 15) && ((first2digs == "34") || (first2digs == "37"));
				break;

			case 1: //Bankcard 560-561 16 
				result = (cardLen == 16) && ((first3digs == "560") || (first3digs == "561"));
				break;

			case 2: //Diners Club International[1] 36 15 
				result = (cardLen == 15) && (first2digs == "36");
				break;

			case 3: //Diners Club US & Canada[1] 55 16 
				result = (cardLen == 16) && (first2digs == "55");
				break;

			//As of October 1st, 2005, Discover Bank will include a new BIN in the range of 650000-650999.
			case 4: //Discover Card 6011 and 650* 16 
				result = (cardLen == 16) && ((first3digs == "650") || (first4digs == "6011"));
				break;

			case 5: //JCB 3 16 
				result = (cardLen == 16) && (firstdig == "3");
				break;

			case 6: //JCB 1800 and 2131 15 
				result = (cardLen == 15) && ((first4digs == "1800") || (first4digs == "2131"));
				break;

			//As of November 8, 2004, MasterCard purchased the domestic (US) Diner's Club BIN range.
			//Diner's club international's website makes no reference to old 38 prefix numbers,
			//and they can be presumed reissued under the 55 or 36 BIN prefix

			case 7: //MasterCard* 51-55, 36 14 or 16 
				result = ((cardLen == 14) || (cardLen == 16)) && ((first2digs == "36") || (first2digs == "51") || (first2digs == "52") || (first2digs == "53") || (first2digs == "54") || (first2digs == "55") || (first2digs == "58") ||(first2digs == "38"));
				break;

			case 8: //Visa 4 13 or 16 	
				result = ((cardLen == 13) || (cardLen == 16)) && (firstdig == "4");
				break;
		}
		if(result) return true;
        //by passing CC validation for now 27 July 2006 SD
        //return true; 

	}
	return false;

}



function validateExpDate(expDate){

	//valid are  mmyy, mm/yy, mm20yy, mm/20yy

	var rex = /^(([0]\d{1})|([1]([012])))(\/?)(([2][0])?)(\d{2})$/;

	return rex.test(expDate);

}



function validateExpMonth(expDate){

	//valid are  01-12

	var rex = /^(([0]?\d{1})|([1]([012])))$/;

	return rex.test(expDate);

}



function validateExpYear(expDate){

	//valid are  mmyy, mm/yy, mm20yy, mm/20yy

	var rex = /^(([2][0])?)(\d{2})$/;

	return rex.test(expDate);

}





function validateCVC2(cvc2){

	//valid are ddd or dddd

	var rex = /^(\d{3,4})$/;

	return cvc2==""?true:rex.test(cvc2);

}



function validateName(name){

	var rex = /^[a-zA-Z \-\']+$/;

	return rex.test(name);

}

function CheckField(frm, fname, ftitle){

	if(frm.elements[fname].value == ""){

		alert("Please enter " + ftitle);

		frm.elements[fname].focus();

		return false;

	}

	else{

		return true;

	}

}



function CheckAddProduct(frm, min_order, max_order, allowed_max){

	var rex = /^(\d{1,})$/

	if(!rex.test(frm.elements["oa_quantity"].value)){

		alert(msg_numeric_product_quantity);

		frm.elements["oa_quantity"].focus();

		return false;

	}

	if((frm.elements["oa_quantity"].value *1) < min_order){

		alert("The number of items ordered exceeded the minimum allowed.\nPlease adjust the quantity of this order");

		frm.elements["oa_quantity"].focus();

		return false;

	}

	if((max_order != "-") && (frm.elements["oa_quantity"].value * 1 > max_order)){

		alert("The number of items ordered exceeded the maximum allowed.\nPlease adjust the quantity of this order");

		frm.elements["oa_quantity"].focus();

		return false;

	}

	if((allowed_max != "-") && (frm.elements["oa_quantity"].value * 1 > allowed_max)){

		alert("We sorry but this order will exceed our current inventory of " + allowed_max + " for this product.\nPlease adjust the quantity of this order");

		frm.elements["oa_quantity"].focus();

		return false;

	}

	return true;

}



function CheckResetPassword(frm){

	if(!CheckField(frm, "login", "username")) return false;

	if(!isEmail(frm.elements["email"].value)){

		alert(msg_enter_valid_email);

		frm.elements["email"].focus();

		return false;

	}

	return true;

}



function CheckCartForm(frm){

	var irex = /^oa_quantity\[(\d{1,})\]$/;

	var drex = /^(\d{1,})$/

	for(i=0; i<frm.elements.length; i++){

		if(irex.test(frm.elements[i].name)){

			if(!drex.test(frm.elements[i].value)){

				alert(msg_numeric_product_quantity);

				frm.elements[i].focus();

				return false;	

			}

			

			if(frm.elements[i].value * 1 < (frm.elements["min_" + frm.elements[i].name].value) * 1){

				alert("The number of items ordered exceeded the minimum allowed.\nPlease adjust the quantity of this order");

				frm.elements[i].focus();

				return false;

			}

			if(

				(frm.elements["max_" + frm.elements[i].name].value != "-") && 

				(frm.elements[i].value * 1 > frm.elements["max_" + frm.elements[i].name].value * 1)

			){

				alert("The number of items ordered exceeded the maximum allowed.\nPlease adjust the quantity of this order");

				frm.elements[i].focus();

				return false;

			}

			if(

				(frm.elements["allowed_" + frm.elements[i].name].value != "-") && 

				(frm.elements[i].value * 1 > frm.elements["allowed_" + frm.elements[i].name].value * 1)

			){

				alert("We sorry but this order will exceed our current inventory of " + frm.elements["allowed_" + frm.elements[i].name].value + " for this product.\nPlease adjust the quantity of this order");

				frm.elements[i].focus();

				return false;

			}

		}

	}

	return true;

}



function CheckNewsletters(frm){

	if(!isEmail(frm.elements["email"].value)){

		alert(msg_enter_valid_email);

		frm.elements["email"].focus();

		return false;

	}

	//alert(frm.elements["email_updates"]);

	if((!frm.elements["email_updates"].checked) && (!frm.elements["email_newsletters"].checked)){

		alert(msg_choose_min_1checkbox);

		frm.elements["email_updates"].focus();

		return false;

	}

	return true;

}



function CheckUnsubscribe(frm){

	if(!isEmail(frm.elements["email"].value)){

		alert(msg_enter_valid_email);

		frm.elements["email"].focus();

		return false;

	}

	//alert(frm.elements["email_updates"]);

	if((!frm.elements["email_updates"].checked) && (!frm.elements["email_newsletters"].checked)){

		alert(msg_choose_min_1checkbox);

		frm.elements["email_updates"].focus();

		return false;

	}

	if(confirm(msg_want_cancel_subscription)){

		return true;

	}

	return false;

}



function CheckLoginForm(frm){

	if(!CheckField(frm, "login", msg_your_username)) return false;

	if(!CheckField(frm, "password", msg_your_password)) return false;

	return true;

}



/////////////////////////////

// CHECK SIGNUP FORM

function CheckSignupForm(frm, fm_company, fm_address2, fm_phone, ship2all, ship2countries){

	if(!CheckField(frm, "form[fname]", msg_first_name)) return false;

	if(!CheckField(frm, "form[lname]", msg_last_name)) return false;

	if(fm_company == "Required" && (!CheckField(frm, "form[company]", 'Company Name'))) return false;

	if(!CheckField(frm, "form[address1]", msg_address_line1)) return false;

	if(fm_address2 == "Required" && (!CheckField(frm, "form[address2]", 'Address Line 2'))) return false;

	if(!CheckField(frm, "form[city]", msg_city_name)) return false;

	if(!CheckField(frm, "form[country]", msg_country)) return false;

	//check is there USA or Canada

	if(frm.elements["form[country]"].value == 1 || frm.elements["form[country]"].value == 2){

		//check USA state

		if(frm.elements["form[country]"].value == 1){	

			if(frm.elements["form[state]"].value < 1 || frm.elements["form[state]"].value > 51){

				alert(msg_select_usa_state);

				frm.elements["form[state]"].focus();

				return false;

			}

		}

		//check Canadian Province

		if(frm.elements["form[country]"].value == 2){	

			if(frm.elements["form[state]"].value < 51 || frm.elements["form[state]"].value > 64){

				alert(msg_select_canada_province);

				frm.elements["form[state]"].focus();

				return false;

			}

		}

	}

	else{

		//check custom province/state

		if(!CheckField(frm, "form[province]", msg_custom_province_state)) return false;

	}

	

	if(!CheckField(frm, "form[zip]", msg_zip_postal_code)) return false;

	if(fm_address2 == "Required" && (!CheckField(frm, "form[phone]", msg_phone_number))) return false;

	

	if(!ship2all && frm.elements["form[thesame]"].checked){

		//check shipping country

		c = frm.elements["form[country]"].value;

		is_country = false;

		for(i=1; i<= ship2countries.length; i++){

			if(ship2countries[i] == c){

				is_country = true;

			}

		}

		if(!is_country){

			alert("We do not shipping to the country you have entered as your billing address.\nPlease uncheck \"Shipping address is the same as billing\" or select different country");

			return false;

		}

	}

	

	if(!CheckField(frm, "form[email]", msg_email_address)) return false;

	if(!isEmail(frm.elements["form[email]"].value)){

		alert(msg_enter_valid_email);

		frm.elements["form[email]"].focus();

		return false;

	}

	if(!CheckField(frm, "form[login]", msg_username)) return false;

	if(!CheckField(frm, "form[password]", msg_password)) return false;

	if(!CheckField(frm, "form[password2]", msg_password_confirmation)) return false;

	if(frm.elements["form[agree]"].checked == false){

		alert(msg_read_terms_before_registration);

		return false;

	}

	return true;

}



function CheckShippingAddress(frm, fm_company, fm_address2){

	if(!CheckField(frm, "form[name]", msg_name)) return false;

	if(fm_company == "Required" && (!CheckField(frm, "form[company]", 'Company Name'))) return false;

	if(!CheckField(frm, "form[address1]", msg_address_line1)) return false;

	if(fm_address2 == "Required" && (!CheckField(frm, "form[address2]", 'Address Line 2'))) return false;

	if(!CheckField(frm, "form[city]", msg_city_name)) return false;

	if(!CheckField(frm, "form[country]", msg_country)) return false;

	//check is there USA or Canada

	if(frm.elements["form[country]"].value == 1 || frm.elements["form[country]"].value == 2){

		//check USA state

		if(frm.elements["form[country]"].value == 1){	

			if(frm.elements["form[state]"].value < 1 || frm.elements["form[state]"].value >51){

				alert(msg_select_usa_state);

				frm.elements["form[state]"].focus();

				return false;

			}

		}

		//check Canadian Province

		if(frm.elements["form[country]"].value == 2){	

			if(frm.elements["form[state]"].value < 51 || frm.elements["form[state]"].value >64){

				alert(msg_select_canada_province);

				frm.elements["form[state]"].focus();

				return false;

			}

		}

	}

	else{

		//check custom province/state

		if(!CheckField(frm, "form[province]", msg_custom_province_state)) return false;

	}

	if(!CheckField(frm, "form[zip]", msg_zip_postal_code)) return false;

	return true;

}



function CheckShippingForm(frm, fm_company, fm_address2, ship2all, ship2countries){

	var address_selected = false;

	if(!ship2all){

		for(i=0;i<frm.elements.length;i++){

			if(frm.elements[i].name == "shipping_address"){

				if(frm.elements[i] && frm.elements[i].checked && frm.elements[i].value){

					//check country

					if(frm.elements[i].value == "new"){

						//address_selected = frm.elements["form[country]"].value;

					}

					else{

						address_selected = frm.elements["country_" + frm.elements[i].value].value;

					}

				}

			}

		}

		//check shipping country

		if(address_selected){

			is_country = false;

			for(i=1; i<= ship2countries.length; i++){

				if(ship2countries[i] == address_selected){

					is_country = true;

				}

			}

			if(!is_country){

				alert("We do not shipping to the country which is set in shipping address you have selected.\nPlease select different shipping address or enter new shipping address");

				return false;

			}

		}

	}

	

	ra = document.getElementById("id_new_address_radio");

	hi = document.getElementById("id_new_address_hidden");

	he = document.getElementById("id_express_address_hidden");

	if((ra && ra.checked) || hi || he){

		if(!CheckShippingAddress(frm, fm_company, fm_address2)) return false;

		if(!ship2all){

			is_country = false;

			for(i=1; i<= ship2countries.length; i++){

				if(ship2countries[i] == frm.elements["form[country]"].value){

					is_country = true;

				}

			}

			if(!is_country){

				alert("We do not ship to the address you have entered in the shipping field.\nTo complete order please select a different country.");

				return false;

			}

		}

	}

	return true;

}



///////////////////////////////

// CHECK BILLING FORM

function CheckBillingForm(frm, fm_company, fm_address2, fm_phone){

	if(!CheckField(frm, "form[fname]", msg_first_name)) return false;

	if(!CheckField(frm, "form[lname]", msg_last_name)) return false;

	if(fm_company == "Required" && (!CheckField(frm, "form[company]", 'Company Name'))) return false;

	if(!CheckField(frm, "form[address1]", msg_address_line1)) return false;

	if(fm_address2 == "Required" && (!CheckField(frm, "form[address2]", 'Address Line 2'))) return false;

	if(!CheckField(frm, "form[city]", msg_city_name)) return false;

	//check is there USA or Canada

	if(frm.elements["form[country]"].value == 1 || frm.elements["form[country]"].value == 2){

		//check USA state

		if(frm.elements["form[country]"].value == 1){	

			if(frm.elements["form[state]"].value < 1 || frm.elements["form[state]"].value > 51){

				alert(msg_select_usa_state);

				frm.elements["form[state]"].focus();

				return false;

			}

		}

		//check Canadian Province

		if(frm.elements["form[country]"].value == 2){	

			if(frm.elements["form[state]"].value < 51 || frm.elements["form[state]"].value > 64){

				alert(msg_select_canada_province);

				frm.elements["form[state]"].focus();

				return false;

			}

		}

	}

	else{

		//check custom province/state

		if(!CheckField(frm, "form[province]", msg_custom_province_state)) return false;

	}

	if(!CheckField(frm, "form[zip]", msg_zip_postal_code)) return false;

	if(fm_phone == "Required" && (!CheckField(frm, "form[phone]", 'Phone Number'))) return false;

	if(!CheckField(frm, "form[email]", msg_email_address)) return false;

	if(!isEmail(frm.elements["form[email]"].value)){

		alert(msg_enter_valid_email);

		frm.elements["form[email]"].focus();

		return false;

	}

	return true;

}



///////////////////////////////

// CHECK PROFILE FORM



function CheckProfileForm(frm, fm_company, fm_address2, fm_phone){

	if(!CheckField(frm, "form[fname]", msg_first_name)) return false;

	if(!CheckField(frm, "form[lname]", msg_last_name)) return false;

	if(fm_company == "Required" && (!CheckField(frm, "form[company]", 'Company Name'))) return false;

	if(!CheckField(frm, "form[address1]", msg_address_line1)) return false;

	if(fm_address2 == "Required" && (!CheckField(frm, "form[address2]", 'Address Line 2'))) return false;

	if(!CheckField(frm, "form[city]", msg_city_name)) return false;

	if(!CheckField(frm, "form[country]", msg_country)) return false;

	//check is there USA or Canada

	if(frm.elements["form[country]"].value == 1 || frm.elements["form[country]"].value == 2){

		//check USA state

		if(frm.elements["form[country]"].value == 1){	

			if(frm.elements["form[state]"].value < 1 || frm.elements["form[state]"].value > 51){

				alert(msg_select_usa_state);

				frm.elements["form[state]"].focus();

				return false;

			}

		}

		//check Canadian Province

		if(frm.elements["form[country]"].value == 2){	

			if(frm.elements["form[state]"].value < 51 || frm.elements["form[state]"].value > 64){

				alert(msg_select_canada_province);

				frm.elements["form[state]"].focus();

				return false;

			}

		}

	}

	else{

		//check custom province/state

		if(!CheckField(frm, "form[province]", msg_custom_province_state)) return false;

	}

	if(!CheckField(frm, "form[zip]", msg_zip_postal_code)) return false;

	if(fm_phone == "Required" && (!CheckField(frm, "form[phone]", msg_phone_number))) return false;

	if(!CheckField(frm, "form[email]", msg_email_address)) return false;

	if(!isEmail(frm.elements["form[email]"].value)){

		alert(msg_enter_valid_email);

		frm.elements["form[email]"].focus();

		return false;

	}

	if(frm.elements["form[password]"].value != ""){

		if(frm.elements["form[password]"].value != frm.elements["form[password2]"].value){

			alert(msg_different_password_and_comfirmation);

			frm.elements["form[password]"].focus();

			return false;

		}

	}

	return true;

}



function CheckEmail2FriendForm(frm){

	if(!CheckField(frm, "yname", msg_your_name)) return false;

	if(!CheckField(frm, "yemail", msg_your_email_address)) return false;

	if(!isEmail(frm.elements["yemail"].value)){

		alert(msg_enter_valid_email);

		frm.elements["yemail"].focus();

		return false;

	}

	if(!CheckField(frm, "fname", msg_your_friend_name)) return false;

	if(!CheckField(frm, "femail", msg_your_friend_email_address)) return false;

	if(!isEmail(frm.elements["femail"].value)){

		alert(msg_enter_valid_email);

		frm.elements["femail"].focus();

		return false;

	}

	return true;

}



function ConfirmDeleteShippingAddress(delete_url){

	if(confirm("Do you really want to delete select address?")){

		document.location = delete_url;

	}

}