diff --git a/addons/website_sale/static/src/js/website_sale.js b/addons/website_sale/static/src/js/website_sale.js
index c316f69d53c..66d2985e43f 100644
--- a/addons/website_sale/static/src/js/website_sale.js
+++ b/addons/website_sale/static/src/js/website_sale.js
@@ -211,7 +211,7 @@ $('.oe_website_sale').each(function () {
     });
 
     $('.oe_website_sale .a-submit, #comment .a-submit').off('click').on('click', function (event) {
-        if (!event.isDefaultPrevented()) {
+        if (!event.isDefaultPrevented() && !$(this).is(".disabled")) {
             $(this).closest('form').submit();
         }
     });
@@ -308,11 +308,11 @@ $('.oe_website_sale').each(function () {
         if (product_id) {
             $parent.removeClass("css_not_available");
             $product_id.val(product_id);
-            $parent.find(".js_check_product").removeAttr("disabled");
+            $parent.find("#add_to_cart").removeClass("disabled");
         } else {
             $parent.addClass("css_not_available");
             $product_id.val(0);
-            $parent.find(".js_check_product").attr("disabled", "disabled");
+            $parent.find("#add_to_cart").addClass("disabled");
         }
     });