如何将tbody中指定id的tr移除

<tbody id="mainbody">
 　　 <tr id="delCell">
  　　　　<td>name</td>
  　　　　<td>address</td>
　　 </tr>
</tbody>

<script type="text/javascript">
 function deleteCell(bodyname,cellname){
      var mailbody = document.getElementById(bodyname);
      var cell = document.getElementById(cellname);
      if(cell != undefined){
             mainbody.removeChild(cell);
      } 
 }
</script>