How do I change HTML table cell color on click

Question

I'm trying to change the background color of an HTML table cell when the user clicks on the cell. Any ideas on how to do this? I have access to the JS Prototype library, so any suggestions for Prototype or straight Javascript would be welcome.

Solution

Ugly, but demonstrates the effect:

  <table>
    <tr>
        <td onclick="this.style.backgroundColor = 'Red';">Sample</td>
        <td onclick="this.style.backgroundColor = 'Blue';">Data</td>
    </tr>
  </table>