document.addEventListener('DOMContentLoaded', function() { const packageKnowledgeSelect = document.querySelector('select[name="package-knowledge"]'); const packageOptionsDiv = document.getElementById('package-options'); const noStressMessageDiv = document.getElementById('no-stress-message'); packageKnowledgeSelect.addEventListener('change', function() { if (this.value === 'Yes') { packageOptionsDiv.style.display = 'block'; noStressMessageDiv.style.display = 'none'; } else { packageOptionsDiv.style.display = 'none'; noStressMessageDiv.style.display = 'block'; } }); });