Js全选，插入实现

  //全选
        function CheckAll() {
            ids.splice(0, 1000000);
            var flag = $("#All_Check").attr("checked");
            $(".orderCheck").each(function () {
                    if (typeof (flag) == 'undefined')
                        flag = false;
                    //$(":input[type=checkbox]").attr("checked", flag);
                    $(this).children().attr("checked", flag);
                    if ($(this).children().attr("checked")) {
                        ids.push($(this).attr("SupplierId"));
                    } else {
                        for (var i in ids) {
                            if ($(this).attr("SupplierId") == ids[i]) {
                                ids.splice(i, 1);
                                break;
                            }
                        }
                    }
                }
            );
            $("#hfids").val(ids);
        }
        //插入订单号
        function InsertOrderCoder(obj) {
            if (obj.attr("checked")) {
                ids.push(obj.parent().attr("SupplierId"));
            }
            else {
                for (var i in ids) {
                    if (obj.parent().attr("SupplierId") == ids[i]) {
                        ids.splice(i, 1);
                        break;
                    }
                }
            }
            $("#hfids").val(ids);
        }
        //点击搜索加载所有勾选的供应商
        function ConfirmSelectedId()
        {
            ids.splice(0, 1000000);
            $(".orderCheck").each(function () {
                if ($(this).children().attr("checked")) {
                    ids.push($(this).attr("SupplierId"));
                }
            }
            );
            $("#hfids").val(ids);
        }
 
  <td style="text-align:right;">
                 <asp:Button ID="btSearch" Text="搜索" runat="server" style="height: 25px; width: 60px;" OnClick="btSearch_Click" OnClientClick="ConfirmSelectedId();"/>
            </td>
 
 <th width="4%">
                 <input type="checkbox" id="All_Check" onclick="CheckAll();" />
</th>
 
 <td align="center">
                         <%--<input type="checkbox" class="orderCheck" value='<%# Eval("SupplierId")%>' name="<%# Eval("ProductBaseId")%>" onclick="InsertOrderCoder($(this));" />--%>
                      <asp:CheckBox runat="server" CssClass="orderCheck"  SupplierId='<%# Eval("SupplierId")%>' onclick="InsertOrderCoder($(this));"/>
 
                    </td>