How to find the parent element using javascript

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I want to change the background color of the table cell when radio button inside the cell is clicked.

<table>
  <tr>
    <td align="center">
      <input type="radio" value="foo"
        onclick="this.parentElement.style.background-color='red';" />
     </td>
  </tr>
</table>

How to get the parent element reference?


Using plain javascript:

element.parentNode

In jQuery:

element.parent()