Select parent element with javascript (no Jquery)

Question

I have two elements and would like to select the parent element using Javascript only, someone knows some way?

<tr>
    <td id="filho"><td>
</tr>

Answer 1

Utilize parentNode: Node.parentNode

var filho = document.getElementById("filho");
var pai = filho.parentNode;

console.log(pai);

<div id="pai">
  Sou Pai
  <div id="filho">
    Sou filho do meu pai :D
  </div>
</div>

Answer 2

Use the property parentNode

Ex:

document.getElementById('filho').parentNode