document.addEventListener("DOMContentLoaded", function() { const sourceField = document.getElementById('source'); const mediumField = document.getElementById('medium'); const campaignField = document.getElementById('campaign'); if (sourceField) sourceField.value = localStorage.getItem('source') || ''; if (mediumField) mediumField.value = localStorage.getItem('medium') || ''; if (campaignField) campaignField.value = localStorage.getItem('campaign') || ''; });