1 ไอดีเก็บ 3 textbox จะเก็บลงอาร์เรย์ยังไงหรอครับ ต้องเป็น2มิติมั้ยคับ

<script type="text/javascript">
$(function(){
  $("#addRow").click(function(){
    var row = $("#myTbl tr").size();
    $("#firstTr:eq(0)").clone(true) 
    .find("input").attr("value","").end()
    .find("span").text(row + 1).end()
    .appendTo($("#myTbl"));
  });
  $("#removeRow").click(function(){
    if($("#myTbl tr").size()>1){
      $("#myTbl tr:last").remove();
    }else{
      alert("ต้องมีรายการข้อมูลอย่างน้อย 1 รายการ");
    }
  });     
});
</script>
</head>

        </table>
        <table id="myTbl" border="1" cellspacing="0" cellpadding="5" align="center" width="500">
                <tr id="firstTr" class="txt_black_5901" <?=$bgcolor?> onMouseover="this.bgColor='#fedbdb'" onMouseout="this.bgColor='<?=$color_row?>'">
                  <td id = "id_count[]" width="32" align="center"><span>1</span></td>
                  <td id = "id_num1[]" width="150" align="right"><input type='text' size="8" > </td>
                  <td id = "id_num2[]" width="150" align="right"><input type='text' size="8" > </td>
                  <td id = "id_num3[]" width="150" align="right"><input type='text' size="8" > </td>
                </tr>
                </table>
                <table border="1" cellspacing="0" cellpadding="2" align="center" width="500">
                <tr bgcolor="#d3cdaf" class="table_header_1">
                  <td width="35" align="center"></td>
                  <td width="150" align="right">0</td>
                  <td width="150" align="right">0</td>
                  <td width="150" align="right">0</td>
                </tr>
                </table>
<table  border="0" cellspacing="2" cellpadding="5" align="center" width="500">
  <tr>
    <td><button id="addRow" type="button">+</button>  
  &nbsp;
    <button id="removeRow" type="button">-</button>
  &nbsp;
  &nbsp;
  &nbsp;</td><td align="left" width="55%">
    <button  id="Submit" type="submit">บันทึกรายการ</button>    
    </td>
  </tr>
</table>