在DispHTMLDivElement中实现类似getElementsByName的功能

我有一个div 我现在想获取这个div中所有id 为 "chkIDV3"的checkbox
前台代码结构如下<asp:Repeater ID="rptFormList" runat="server" OnItemDataBound="rptFormList_OnItemDataBound">
                                        <ItemTemplate>
                                            <div id="divBFName<%# Container.ItemIndex %>" type="form" style="display: none; height: 100%;
                                                width: 100%; overflow: auto;">
                                                <asp:DataGrid ID="dgFormList" runat="server" SkinID="FixTable" Style="table-layout: fixed;"
                                                    OnItemDataBound="dgFormList_OnItemDataBound" AutoGenerateColumns="False">
                                                    <Columns>
                                                        <asp:TemplateColumn HeaderStyle-Width="4%" ItemStyle-HorizontalAlign="Center">
                                                            <ItemTemplate>
                                                                <input id="chkIDV3" class="idbox" type="checkbox" name="chk" onclick="selectRow(this)" value='<%# Eval("BFFID") %>'>
                                                            </ItemTemplate>
                                                        </asp:TemplateColumn>
                                                        
                                                    </Columns>
                                                </asp:DataGrid>
                                            </div>
                                        </ItemTemplate>
                                    </asp:Repeater>