content_width_20px_height_20px_container_width_200px_height_200px_center_top_IE_minVer_9.txt

<div id="container">
  <div id="content"></div>
</div>

#parent {
height: 200px;
width: 200px;
}

#child {
height: 20px;
margin-left: auto;
margin-right: auto;
width: 20px;
}