//###################################################################
//VALLIDATE REQUIRED FORM FIELDS
//###################################################################
function js_validateForm(form) {

    var reqfields=document.getElementById('required').value.split(',');
    var matchfields=document.getElementById('match').value.split(',');

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

        var field_value = document.getElementById(reqfields[i]).value;
        var field_id = document.getElementById(reqfields[i]);         

        if (field_id.style.backgroundColor == "#f8caca") field_id.style.backgroundColor = "white";

        if (field_value == null || field_value == '') {
        
           field_id.style.backgroundColor = "#f8caca";

           var form_error = true;

        }

     }

    var termsok_checkbox = document.getElementById("termsok");
    var termsok_span = document.getElementById("termsokspan");

    if (termsok_checkbox) {

       termsok_span.style.backgroundColor = "white";

       if (!termsok_checkbox.checked) {

          termsok_span.style.backgroundColor = "f8caca";
          var form_error = true;

       }

    }

    if (!form_error) {

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

           var field_value = document.getElementById(matchfields[i]).value;
           var confirm_field_value = document.getElementById(matchfields[i] + "_confirm").value;
           var field_id = document.getElementById(matchfields[i]);         
           var confirm_field_id = document.getElementById(matchfields[i] + "_confirm");         

           if (field_id.style.backgroundColor = "yellow") field_id.style.backgroundColor = "white";
           if (confirm_field_id.style.backgroundColor = "yellow") confirm_field_id.style.backgroundColor = "white";

           if (!confirm_error) {

              if (field_value != confirm_field_value) {

                 field_id.style.backgroundColor = "yellow";
                 confirm_field_id.style.backgroundColor = "yellow";

                 var confirm_error = true;
        
              }

           }

        }

     }
       

if (form_error) {

   window.alert("Required information is missing");

} else if (confirm_error) {

   window.alert("The highlighted values must match");

} else {

   document.getElementById(form).submit();

}
  
}
//###################################################################
//SWITCH TO HTTPS
//###################################################################
function js_goSSL() {

if (location.protocol.toLowerCase() =='http:')  

       location.href = location.href.replace('http:','https:');

}
//###################################################################
//VIEW/HIDE CUSTOMER EDIT FORM
//###################################################################
function js_viewCustomerEditForm() {

    var customer_edit_form_table = document.getElementById('customer_edit_form_table');

    if (customer_edit_form_table.style.display != '') {
 
       customer_edit_form_table.style.display = '';

    } else {

       customer_edit_form_table.style.display = 'none';

    }

}
//###################################################################
//VIEW/HIDE DOWNLOAD INFO AND LINK
//###################################################################
function js_viewDownloadInfo(products_virtual_id) {

    var download_product_tr = document.getElementById('download_product_tr_' + products_virtual_id);

    if (download_product_tr.style.display != '') {
 
       download_product_tr.style.display = '';

    } else {

       download_product_tr.style.display = 'none';

    }

}
//###################################################################
//CHANGES CURRENT PRODUCT IMAGE
//###################################################################
function js_setCurrentProductImage(image) {

    var currentImage = document.getElementById('current_product_image');
    currentImage.src = '/images/shops/' + image;

}
//###################################################################
//USER ALERTS
//###################################################################
function user_alert(type,text) {

i = document.getElementById("user_alert");
x = document.getElementById("user_alert_ok");
y = document.getElementById("user_alert_error");
z = document.getElementById("user_alert_none");

if (x) i.removeChild(x);
if (y) i.removeChild(y);
if (z) i.removeChild(z);

var alert_div = document.createElement("DIV");
alert_div.id = type;
var alert_text = document.createTextNode(text);
alert_div.appendChild(alert_text);
i.appendChild(alert_div);

}

//###################################################################
//SHOW CVN SAMPLE
//###################################################################
function js_showCVNImage() {

var image = document.getElementById("cvn_image");

if (image.style.display == 'none') {

   image.style.display = 'block';

} else {

   image.style.display = 'none';

}

}
//###################################################################
//LUHN AND OTHER TESTS FOR CC NUMBERS
//###################################################################
function js_ccValidate() {

var number = document.getElementById("credit_card_number").value;
var name = document.getElementById("credit_card_name").value;
var cvn = document.getElementById("credit_card_cvn_code").value;
var selectedTypeIndex = document.getElementById("credit_card_type").selectedIndex;
var selectedType = document.getElementById("credit_card_type").options[selectedTypeIndex].value;

var i, sum, weight;
sum=0;

for (i = 0; i < number.length - 1; i++) {

        weight = number.substr(number.length - (i + 2), 1) * (2 - (i % 2));
        sum += ((weight < 10) ? weight : (weight - 9));

}

if (parseInt(number.substr(number.length-1)) != ((10 - sum % 10) % 10)) {

        window.alert("That is not a valid credit card number");
        exit;

}

if (name == '') {

        window.alert("You must enter the name on your credit card");
        exit;

}

if (selectedType != 'laser' && cvn == '') {

        window.alert("You must enter your CVN code. This can be found on the back of your credit card.");
        exit;

}

if (selectedType != 'laser' && cvn.length != 3) {

        window.alert("Your CVN code must be 3 digits.");
        exit;

}

if (selectedType == 'switch') {

   var issue = document.getElementById("credit_card_issue_no").value;

   if (issue == '') {

        window.alert("If you are using Switch, you must enter your card issue number");
        exit;
   }

   if (issue.length > 2 ) {

        window.alert("Your Switch issue number should only have 2 digits");
        exit;
   }


} //else {

   //var issue = document.getElementById("credit_card_issue_no").value;

   //if (issue != '') {

        //window.alert("If you are not using a Switch card, do not enter an issue number");
        //exit;
   //}

//}

var confirm = window.confirm("We will now submit your credit card details for payment. Authorisation may take up to 20 seconds. Please do not click on the Confirm button a second time. If it is OK for us to proceed, please click OK.");

if (!confirm) return;

document.checkout_payment_submit_form.submit();

}