<!doctype html> <meta charset="utf-8"> <title>CSS Test Reference</title> <table> <tbody> <tr> <td>A</td> <td id="target" style="position: relative">B <div style="position: absolute; top: 0; left: 0; width: 100px; height: 100px; background-color: lime;"></div> </td> </tbody> </table>