document.addEventListener('DOMContentLoaded', function() { setTimeout(function() { // Updated to match the specific field name "Source" var sourceField = document.querySelector('input[name="Source"]'); if (sourceField) { sourceField.value = window.location.href; console.log("Success: URL captured: " + window.location.href); } else { // This will show up in your browser console (F12) if it fails console.log("Error: Could not find a form field named 'Source'"); } }, 500); });