var select = document.createElement('select');

var option = document.createElement('option');

option.textContent = 'Option 1';

var option2 = document.createElement('option');

option2.textContent = 'Option 2';

select.appendChild(option);

select.appendChild(option2);

​

select.addEventListener('change', getDetails);

document.body.appendChild(select);

​

function getDetails(e) {

  console.log('Running!');

}