document.addEventListener('DOMContentLoaded', function () { document.querySelectorAll('.wpcf7-form').forEach(function (form) { form.addEventListener('submit', function (e) { var select = form.querySelector('.wpcf7-select[name="product-group"]'); if (select && (select.value === "" || select.value === "Choose a product category")) { e.preventDefault(); alert("Please choose a product category."); } }); }); });