function addDrawing(url, html, id) {
  var elem = document.createElement('a');
  elem.id = id;
  elem.onclick = function() {tableauClicked(id)};
  fetch(url)
  .then( r => r.text() )
  .then(t => elem.innerText = t)
  html.appendChild(elem)
}

function prependDrawing(url, html) {
  fetch(url)
  .then( r => r.text() )
  .then(t => html.innerHTML = t + html.innerHTML);
}

function prependDrawing(url, html) {
  fetch(url)
  .then( r => r.text() )
  .then(t => html.insertAdjacentHTML('afterbegin', t));
}