動態添加、刪除上傳控件.

    <form id="form1" runat="server">
        <table id="tb1" border="0">
            <tr><td><a href="#" οnclick="return addFj()">添加附件</a></td></tr>
        </table>
        <input type="hidden" name="fjCnt" value="1" />
    </form>
</body>
</html>
<script type="text/javascript" language="javascript">
  function addFj()
  {
      var oTb = document.getElementById("tb1");
      var oTr = oTb.insertRow(0);
      var name = "thefilename"+document.form1.fjCnt.value;
      document.form1.fjCnt.value=parseInt(document.form1.fjCnt.value)+1;
      oTr.insertCell(0).innerHTML = "<input id='file' name='"+name+"' type=file style='width:400px;'> <input type=button οnclick='return delFj(this)' value='刪除'>"
      return false;
  }
  function delFj(obj)
  {
      obj.parentElement.parentElement.removeNode(true);
      return false;
  }
</script>