jquery异步提交无刷新

1、引用js文件：

 <script type="text/javascript" src="/JavaScript/jquery-1.2.6.pack.js"></script>

2、编写js:

 //业务种类改变
        function sel_YWZL_Change(num)
        {
           var val = document.getElementById('GV_CommonData_ctl' + num + "_sel_YWZL").value;          
           var cx = document.getElementById('GV_CommonData_ctl' + num + "_sel_FYMC");   
           $.ajax({ type: "get", dataType: "html", url: "GetSFLC.aspx?YWZL="+encodeURI(val)+"&timestamp=" + new Date().getTime(), data: "", success: function(data)
            {
                func_getCX(data,cx);
            }});          
        }
       
        //返回结果调用js

        function func_getCX(fyxm, obj)
        {
            var arrsel = fyxm.split(',');
            var alen = arrsel.length;
            obj.options.length = 0;       
            var count = 0;          
            for(var i = 0; i < alen; i++)
            {
                obj.options.add(new Option(arrsel[i].toString(),arrsel[i].toString()));
                if(obj.options[i].value != "运费")
                    count = count+1;
            } 
   
            if(count == alen)
            {
                obj.options.add(new Option("运费","运费"));               
            }
            obj.value = "运费";
       }

3、新建异步调用页面：GetSFLC.aspx

 if (Request["YWZL"] != null && Request["YWZL"].ToString() != string.Empty)
        {
            string ywzl = Request["YWZL"].ToString();
            DataSet ds_fymc = new DataSet();
            if (ywzl == "不限")
            {
                ds_fymc = _BasicDAL.GetProc("select FYXM from YWLXFYXMSZ where YWLX='运输'");
            }
            else
            {
                ds_fymc = _BasicDAL.GetProc("select FYXM from YWLXFYXMSZ where YWZL='" + ywzl + "' and YWLX='运输'");
            }
            if (ds_fymc != null && ds_fymc.Tables.Count > 0)
            {
                string[] DDParm = new string[] { "FYXM" };
                DataTable dt = _gl.DefinitionTable(DDParm);
                string fy = "";
                for (int s = 0; s < ds_fymc.Tables[0].Rows.Count; s++)
                {
                    fy += ds_fymc.Tables[0].Rows[s][0].ToString().TrimEnd(',') + ',';
                }
                string[] fyxms = fy.TrimEnd(',').Split(',');
                for (int g = 0; g < fyxms.Length; g++)
                {
                    DataRow dr = dt.NewRow();
                    dr["FYXM"] = fyxms[g].ToString();
                    dt.Rows.Add(dr);
                }
                DataTable dft = dt.DefaultView.ToTable(true, "FYXM");
                string fym = "";
                for (int x = 0; x < dft.Rows.Count; x++)
                {
                    fym += dft.Rows[x][0].ToString() + ',';
                }
                Response.Write(fym.TrimEnd(','));
            }
            else
            {
                Response.Write("");
            }
        }

 Response.End();