UPDATE

How about this... http://jsfiddle.net/gSaPb/


Check out my example on jsFiddle: http://jsfiddle.net/QzPGu/

HTML

<table>
  <tr>
    <td>
      <input type="checkbox" name="myTextEditBox" value="checked" /> checkbox
    </td>
  </tr>
</table>

CSS

td {
  text-align: center; /* center checkbox horizontally */
  vertical-align: middle; /* center checkbox vertically */
}
table {
  border: 1px solid;
  width: 200px;
}
tr {
  height: 80px;   
}

I hope this helps.