$(document).ready(function () {

         setTimeout(GetDate, 1000);

     });

     function GetDate() {

         $("#tbData tbody").find("tr").each(function () {

             var prjectBalanceObj = $(this).find("td:eq(3)");

             var xmbhObj = $(this).find("td:eq(0)").html();

             $.ajax({

                 type: "get",

                 async: true,

                 url: "ashx/GetData.ashx?id=" + $(this).find("td:eq(1)").html(),

                 contentType: "application/x-www-form-urlencoded; charset=utf-8",

                 beforeSend: function (XMLHttpRequest) {

                 },

                 success: function (data, textStatus) {

                     prjectBalanceObj.html(data);

                 },

                 complete: function (XMLHttpRequest, textStatus) {

                     //alert("XMLHttpRequest:" + XMLHttpRequest + "--textStatus" + textStatus);

                 },

                 error: function () {

                     //alert("获取数据出错");

                 }

             });

         })

     }

 <h2>Jquery Ajax 异步设置Table某列的值</h2>

 <table class="bordered" id="tbData" >

     <thead>

     <tr>

         <th>No</th>

         <th>ID</th>

         <th>名称</th>

         <th>金额</th>

     </tr>

     </thead>

     <tbody>

     <tr>

         <td>1</td>

         <td>001</td>

         <td>编码1</td>

         <td></td>

     </tr>

     <tr>

         <td>2</td>

         <td>002</td>

         <td>编码2</td>

         <td></td>

     </tr>

     <tr>

         <td>3</td>

         <td>003</td>

         <td>编码3</td>

         <td></td>

     </tr>

     <tr>

         <td>4</td>

         <td>004</td>

         <td>编码4</td>

         <td></td>

     </tr>

     <tr>

         <td>5</td>

         <td>005</td>

         <td>编码5</td>

         <td></td>

     </tr>

     </tbody>

 </table>