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);


	var first5digs = cardNum.substring(0,5);


	var first6digs = cardNum.substring(0,6);


	


	


	//cascade validation


	//source: http://en.wikipedia.org/wiki/Credit_card_number


	for(i=0; i<11; 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 == "56") || (first2digs == "57")||(first2digs == "58") || (first2digs == "38"));


				break;


			case 8: //Visa 4 13 or 16 	


				result = ((cardLen == 13) || (cardLen == 16)) && (firstdig == "4");


				break;


			case 9: //Solo (debit card)


				result = ((cardLen == 16) || (cardLen == 18) || (cardLen == 19)) && (first4digs == "6334" || first4digs == "6767");


				break;


			case 10: //Switch (debit card)


				result = ((cardLen == 16) || (cardLen == 18) || (cardLen == 19)) && (first4digs == "4903" || first4digs == "4905" || first4digs == "4911" || first4digs == "4936" || first4digs == "6333" || first4digs == "6759" || first6digs == "564182" || first6digs == "633110");


				break;


		}


		if(result) 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 validateText(txt){


	var d = "";


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


		if(txt.charAt(i) != " "){


			d = d + txt.charAt(i);


		}


	}


	if(d == ""){


		return false;


	}


	else{


		return true;


	}


}





function CheckField(frm, fname, ftitle){


	var s = frm.elements[fname].value;


	var d = "";


	


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


		if(s.charAt(i) != " "){


			d = d + s.charAt(i);


		}


	}


	if(d == ""){


		alert(msg_please_enter + ' ' + ftitle);


		frm.elements[fname].focus();


		return false;


	}


	else{


		return true;


	}


}





function CheckCustomFields(frm, place){


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


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


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


		//	alert(frm.elements[i].name);


			var s = frm.elements[i].name;


			var id = s.substring(13, s.length-1);


			if(frm.elements['custom_field_place[' + id + ']'].value == place){


				if(frm.elements['custom_field_required[' + id + ']'].value == 'yes'){


					//alert(frm.elements[i].type);


					if(frm.elements[i].type == "checkbox" && !frm.elements[i].checked){


						alert(msg_to_continue_please_check + ' ' + frm.elements['custom_field_name[' + id + ']'].value);


						frm.elements[i].focus();


						return false;


					}


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


						alert(msg_please_enter + ' ' + frm.elements['custom_field_name[' + id + ']'].value);


						frm.elements[i].focus();


						return false;


					}


				}


			}


		}


	}


	return true;


}





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


	if(product_may_be_added){


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


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


			alert(msg_enter_numeric_product_quantity);


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


			return false;


		}


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


			alert(msg_number_of_items_exceeded_min);


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


			return false;


		}


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


			alert(msg_number_of_items_exceeded_max);


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


			return false;


		}


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


			alert(msg_number_of_items_exceed_inventory);


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


			return false;


		}


		return true;


	}


	return false;


}





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 prex = /^oa_pid_to_ocid\[(\d{1,})\]$/;


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


	


	var products = new Array();


	


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


		


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


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


				alert(msg_enter_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(msg_number_of_items_exceeded_min);


				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(msg_number_of_items_exceeded_max);


				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(msg_number_of_items_exceed_inventory);


				frm.elements[i].focus();


				return false;


			}


		}


		


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


			var ocid = frm.elements[i].value;


			var pid = frm.elements["oa_ocid_to_pid[" + ocid + "]"].value;


			if(products[pid]){


				products[pid] = products[pid] + frm.elements["oa_quantity[" + ocid + "]"].value * 1;


			}


			else{


				products[pid] = frm.elements["oa_quantity[" + ocid + "]"].value * 1;


			}


			


			if(frm.elements["oa_inventory_control[" + ocid + "]"].value == "Yes"){


				if(frm.elements["allowed_oa_quantity[" + ocid + "]"].value < products[pid]){


					alert(msg_number_of_items_exceed_inventory);


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


					return false;


				}


			}


		}


	}


	return true;


}





function CheckNewsletters(frm){
var catchpaResponse = document.getElementById("catchpa").value;
if( catchpaResponse != theAnswer )
        {
			alert("Please enter the sum of the two numbers in the small box");
            return false;
        }

	if(!isEmail(frm.elements["email"].value)){
		alert(msg_enter_valid_email);
		frm.elements["email"].focus();
		return false;
	}
	return true;
}

function CheckNewsletters1(frm){
var catchpaResponse1 = document.getElementById("catchpa1").value;
if( catchpaResponse1 != theAnswer1 )
        {
			alert("Please enter the sum of the two numbers in the small box");
            return false;
        }

	if(!isEmail(frm.elements["email"].value)){
		alert(msg_enter_valid_email);
		frm.elements["email"].focus();
		return false;
	}
	return true;
}


function CheckUnsubscribe(frm){


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


		alert(msg_enter_valid_email);


		frm.elements["cancel_email"].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){
	
	var catchpaResponse2 = document.getElementById("catchpa2").value;
if( catchpaResponse2 != theAnswer2 )
        {
			alert("Please enter the sum of the two numbers in the anti spam input box");
            return false;
        }


	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]", msg_company_name))) return false;


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


	if(fm_address2 == "Required" && (!CheckField(frm, "form[address2]", msg_address_line2))) return false;


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


	


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


	if(frm.elements["form[state]"].options.length > 1){


		if(frm.elements["form[state]"].value == "" || frm.elements["form[state]"].value == "0"){


			alert(msg_select_province_state);


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


			return false;


		}


	}


	else{


		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(!CheckCustomFields(frm, 'billing')){


		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(msg_incorrect_shipping_address);


			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(!CheckCustomFields(frm, 'account')){


		return false;	


	}


	


	if(!CheckCustomFields(frm, 'signup')){


		return false;	


	}


	


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


		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]", msg_company_name))) return false;


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


	if(fm_address2 == "Required" && (!CheckField(frm, "form[address2]", msg_address_line2))) return false;


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


	


	


	//check is state/province select OR custom state/province


	sd = document.getElementById('div_shipping_address_state');





	if(sd.style.display == "block"){


		//check province/state from select


		if(frm.elements["form[state]"].value == "" || frm.elements["form[state]"].value == "0"){


			alert(msg_select_province_state);


			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(!CheckCustomFields(frm, 'shipping')){


		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]", msg_company_name))) return false;


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


	if(fm_address2 == "Required" && (!CheckField(frm, "form[address2]", msg_address_line2))) return false;


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


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


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


	if(frm.elements["form[state]"].options.length > 1){


		if(frm.elements["form[state]"].value == "" || frm.elements["form[state]"].value == "0"){


			alert(msg_select_province_state);


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


			return false;


		}


	}


	else{


		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(!CheckCustomFields(frm, 'billing')){


		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;


		}


	}


	


	if(!CheckCustomFields(frm, 'account')){


		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(address_id){


	if(confirm(msg_confirm_delete_shipping_address)){


		document.location = site_dinamic_url + 'ua=' + USER_DELETE_ADDRESS + '&address_id=' + address_id;


	}


}





function CheckWishlistName(frm){


	if(!CheckField(frm, "wishlist_name", msg_enterWishlistName)) return false;	


	return true;


}


function CheckWishlistEmailFrm(frm){


	if(!CheckField(frm, "mail_subject", "subject")) return false;	


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


		alert(msg_enter_valid_email);


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


		return false;


	}


	return true;


}


function ConfirmDeleteWishlist(wl_id){


	if(confirm(msg_confirm_delete_wishlist)){		


		document.location = site_dinamic_url + 'p=manage_wishlist&wl_action=delete_wishlist&wlid=' + wl_id;


	}


}





function ConfirmDeleteWishlistProduct(wlp_id){


	if(confirm(msg_confirm_delete_wishlist_product)){		


		document.location = site_dinamic_url + 'p=manage_wishlist&wl_action=delete_product&wlpid=' + wlp_id;


	}


}