点击，跳到相应位置

点击《回复主题》 

<a href="#Bottom"> 回复主题</a>

跳到相应的div：

 

                <div id="bottom">
                    <asp:TextBox ID="txtBody" runat="server" Height="122px" TextMode="MultiLine"
                        Width="537px" EnableTheming="True"></asp:TextBox>
                    <br />