document.addEventListener("DOMContentLoaded", function () { function getUTMParameter(name) { const urlParams = new URLSearchParams(window.location.search); return urlParams.get(name); } const utmSource = getUTMParameter("utm_source"); if (utmSource) { const utmField = document.querySelector("input[email='utm_source']"); if (utmField) { utmField.value = utmSource; } } });