@endsectionentById('loginform').addEventListener('submit', function(event) { const emailInput = document.getElementById('email').value; const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/; // Simple email regex const phoneRegex = /^[0-9]{10,15}$/; // Phone number regex if (!emailRegex.test(emailInput) && !phoneRegex.test(emailInput)) { alert('Please enter a valid email or phone number.'); event.preventDefault(); // Stop form submission } });