动态添加HTML表单控件，无（runat="server"）

JS部分
<script>
        var allChildCount;  //整个模块
        allChildCount = 1;
        var sTxt = "<%=htmlselectName%>";
        function addChildModel() {
            allChildCount++;
            var rown = filetb.rows.length;
            newRow = filetb.insertRow(rown);
            newRow.id = "mytdb" + allChildCount;
            newRow.name = "mytdb" + allChildCount;
            M1 = newRow.insertCell(0);
            var div = "<table>";
            div += "   <tr>";
            div += "        <td>名称</td>";
            div += "        <td>";
            div += "             <select id="ddl_name" + allChildCount + ""  style=" 100px;" class="validate-selection" name="ddl_name" + allChildCount + "" onchange="GetModel('ddl_name" + allChildCount + "','ddl_model" + allChildCount + "','<%=projectId %>');"> <%=htmlselectName%> </select><font color="red">*</font>";
            div += "        </td>";
            div += "        <td>型号</td>";
            div += "        <td>";
            div += "             <select id="ddl_model" + allChildCount + "" style=" 100px;" class="validate-selection"  name="ddl_model" + allChildCount + "" ><option></option></select><font color="red">*</font>";
            div += "        </td>";
            div += "        <td>采购数量</td>";
            div += "        <td>";
            div += "             <input id="tbC_Q" + allChildCount + "" name="tbC_Q" + allChildCount + "" class="required" type="text" style=" 100px;" /><font color="red">*</font>";
            div += "        </td>";
            div += "        <td>";
            div += "        采购价格";
            div += "        </td>";
            div += "        <td>";
            div += "             <input id="tbP_P" + allChildCount + "" name="tbP_P" + allChildCount + "" class="required" type="text" style=" 100px;" />";
            div += "        </td>";
            div += "        <td>";
            div += "         收货时间";
            div += "        </td>";
            div += "        <td>";
            div += "             <input id="tbD_D" + allChildCount + "" name="tbD_D" + allChildCount + ""  class="required" type="text" onclick="WdatePicker()" style=" 100px;" /><font color="red">*</font>";
            div += "             <img src='images/del.gif' style='cursor: pointer;' width='15' height='15' onclick="removeModel(" + allChildCount + ")" alt='删除型号' />";
            div += "         </td>";
            div += "   </tr>";
            div += "</table>";
            M1.innerHTML = div;
        }
</script>

/*删除当前的索引行，从后往前删*/
        function removeModel(count) {
            var o = confirm("确认删除?");
            if (o) {
                var i
                var tdname
                var tdln
                var line = count;
                if (line > 0) {
                    for (i = filetb.rows.length - 1; i >= 0; i--) {
                        tdname = filetb.rows[i].name;
                        tdln = tdname.substring(5, tdname.length);
                        if (tdln == line) {
                            filetb.deleteRow(i);
                        }
                    }
                }
            }
        }

/*清空第一项联系人*/
        function deleteLinkMan() {
            var o = confirm("确认删除?");
            if (o) {
                var otable = document.getElementById("filetb");
                otable.rows[0].style.display = "none";  //隐藏固定的第一行
                //otable.rows[1].style.display = "none";  //隐藏固定的第二行

                $("#ddl_name1").val(0);
                $("#ddl_model1").val(0);
                document.getElementById("tbC_Q1").value = "";
                document.getElementById("tbP_P1").value = "";
                document.getElementById("tbD_D1").value = "";
            }
        }

 for (var i = beginRow; i <= allChildCount; i++) {
                if ($("#ddl_name" + i).length > 0) {   //存在控件
                //根据I，所有控件验证
                 }
}

function GetModel(c1, c2, pid) {
            $.ajax({
                url: "GetData.ashx",
                cache: false,
                data: { "type": "GetCModel", "name": $("#" + c1 + " option:selected ").text(), "pid": pid }, error: function () {
                    alert("数据加载出错!");
                },
                success: function (myData, status) {
                    $("#" + c2 + "").html(myData);
                }
            });
        }

HTML部分
<tr>
                                <td>
                                    收货明细
                                </td>
                                <td>
                                    <table id="filetb" style="font-size: 12px;">
                                        <tr name="mytdb1">
                                            <td>
                                                <table id="ctable">
                                                    <tr>
                                                        <td>
                                                            名称
                                                        </td>
                                                        <td>
                                                            <select id="ddl_name1" style=" 100px;" class="validate-selection" name="ddl_name1"
                                                                onchange="GetModel('ddl_name1','ddl_model1','<%=projectId %>');">
                                                                <%=htmlselectName%>
                                                            </select><font color="red">*</font>
                                                        </td>
                                                        <td>
                                                            型号
                                                        </td>
                                                        <td>
                                                            <select id="ddl_model1" style=" 100px;" class="validate-selection" name="ddl_model1">
                                                                <option></option>
                                                            </select><font color="red">*</font>
                                                        </td>
                                                        <td>
                                                            采购数量
                                                        </td>
                                                        <td>
                                                            <input id="tbC_Q1" name="tbC_Q1" class="required" type="text" style=" 100px;" /><font
                                                                color="red">*</font>
                                                        </td>
                                                        <td>
                                                            采购价格
                                                        </td>
                                                        <td>
                                                            <input id="tbP_P1" name="tbP_P1" class="required" type="text" style=" 100px;" />
                                                        </td>
                                                        <td>
                                                            收货时间
                                                        </td>
                                                        <td>
                                                            <input id="tbD_D1" name="tbD_D1" class="required" type="text" onclick="WdatePicker()"
                                                                style=" 100px;" /><font color="red">*</font>
                                                            <img src='images/del.gif' style='cursor: pointer;' width='15' height='15' onclick="deleteLinkMan()"
                                                                alt='删除型号' />
                                                        </td>
                                                    </tr>
                                                </table>
                                            </td>
                                        </tr>
                                    </table>
                                </td>
                            </tr>
                            <tr>
                                <td>
                                </td>
                                <td align="right">
                                    <input type="button" class="buttoncss" value="增加型号" onclick="return addChildModel()"
                                        id="btnNew" />
                                </td>
                            </tr>

后台CS部分：

public partial class IntegratedProject : BasePage
    {

protected string htmlselectName = "";    //收货物品的名称

//绑定HTML中select
                if (dt != null && dt.Rows.Count > 0)
                {
                    htmlselectName += "<option value=0>请选择..</option>";
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        htmlselectName += "<option value=" + dt.Rows[i]["EquipmentName"].ToString() + ">" + dt.Rows[i]["EquipmentName"].ToString() + "</option>";
                    }
                }

.ashx部分

    using System.Web.SessionState;
    /// <summary>
    /// GetData 的摘要说明
    /// </summary>
    public class GetData : IHttpHandler, IRequiresSessionState
    {

 public void ProcessRequest(HttpContext context)
        {
            //context.Response.ContentType = "text/plain";
            //context.Response.Write("Hello World");
            if (context.Request.Params["type"] == "GetPartsModel")
            {
                GetPartsModel(context.Request.Params["partsId"]);
            }

public void GetCModel(string name, string pid)
        {
            IntegratedProjectBLL IPB = new IntegratedProjectBLL();
            DataTable dt = IPB.GetEquipmentModel(name, pid);
            string html = "";
            if (dt != null && dt.Rows.Count > 0)
            {
                html += "<option value=0>请选择..</option>";
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    html += "<option value=" + dt.Rows[i]["EquipmentModel"].ToString() + ">" + dt.Rows[i]["EquipmentModel"].ToString() + "</option>";
                }
            }
            HttpContext.Current.Response.Write(html);
        }