页面有两个UpdatePanel,现在需要实现第一个UpdatePanel中的是每秒钟刷新,第二个是每30秒刷新。, 在两个UpdatePanel外面还有一个 <asp:ScriptManager ID="ScriptManager1" runat="server">
                    </asp:ScriptManager>控件。。现在碰到的问题是,第二个UpdatePanel不起作用。也跟着第一个一样是每秒刷新。前台相关代码如下:
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <table style="width: 80%; border: 0px solid #DCDCDC; margin: 0 auto;">
                    <tr>
                        <td rowspan="2" style="width: 10px;"> 
                        </td>
                        <td rowspan="2"  valign=bottom align=center>
                            <asp:Panel ID="on" runat="server">
                                <div id="n" style="margin-right: 0; padding: 0px; width: 305px;">
                                    <img src="../../Manager/Image/nocount.png" alt="现在不是竞价时间哦!" /></div>
                            </asp:Panel>
                            <asp:Panel ID="outtime" runat="server">
                                <div id="T" style=" margin-right: 0px; padding: 0px; width: 345px; visibility: visible">
                                    <span style="color: Red; font-size: 15px;">竞拍剩余时间:</span>
                                    <%--<span class="red"><asp:Literal ID="endDay"   runat="server"></asp:Literal></span><span> 
            天 </span> --%>
                                    <span class="red">
                                        <asp:Literal ID="endHour" runat="server"></asp:Literal>
                                    </span><span style="color:Yellow">时 </span><span class="red">
                                        <asp:Literal ID="endminute" runat="server"></asp:Literal></span> <span style="color:Yellow">分 </span>
                                    <span class="red">
                                        <asp:Literal ID="endsecond" runat="server"></asp:Literal></span><span style="color:Yellow">秒</span>
                                </div>
                            </asp:Panel>
                        </td>
                        <td class="h2_title" style="color:Red ">
                            &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;  一、物品信息
                        </td>
                    </tr>
                    <tr>
                        <td style="width: 60%;">
                              <table cellspacing="0" rules="all" border="1px #E0DFE3 solid" style="width: 100%;
                                border-collapse: collapse;">
                                <tr style="border: 1px solid #CCCCCC; height:22px ">
                                    <th style="width: 20%; color:Red; border: 1px solid #CCCCCC; " align="center" scope="col">
                                        竞拍物品
                                    </th>
                                    <th style="width: 19%; color:Red; border: 1px solid #CCCCCC; "  align="center" scope="col">
                                        起拍价
                                    </th>
                                    
                       
                                    <th style="width: 18%;   color:Red; border: 1px solid #CCCCCC; " align="center" scope="col">
                                        成交价
                                    </th>
                                    <th style="width: 18%; display:none; color:Red; border: 1px solid #CCCCCC; " align="center" scope="col">
                                        成交数
                                    </th>
                                     <th style="width: 25%; color:Red; border: 1px solid #CCCCCC; " align="center" scope="col">
                                        交易时段
                                    </th>
                                </tr>
                                <tr style="border: 1px solid #CCCCCC; height:22px ">
                                    <th style="color:red;border: 1px solid #CCCCCC; ">
                                       <asp:Label ID="lb1Nmae" ForeColor="#CCCCCC" runat="server"></asp:Label>
                                    </th>
                                    <th style="color:red;border: 1px solid #CCCCCC; ">
                                        <asp:Label ID="lblStaringPrice" ForeColor="#CCCCCC" runat="server"></asp:Label>
                                    </th>
                                    
                                    <th style="color:red;border: 1px solid #CCCCCC;  ">
                                        <asp:Label ID="lblPrice" ForeColor="#CCCCCC" runat="server"></asp:Label>
                                    </th>
                                   
                                    <th style="color:red;border: 1px solid #CCCCCC;  display:none;">
                                        <asp:Label ID="lblNum" ForeColor="#CCCCCC" runat="server"></asp:Label>
                                    </th>
                                     <th  style="color:red;border: 1px solid #CCCCCC; ">
                                        <asp:Label ID="lblTime" ForeColor="#CCCCCC" runat="server"></asp:Label>
                                    </th>
                                </tr>
                            </table>
                        </td>
                    </tr>
                 
                </table>
                        </td>
                    </tr>
                </table>
           
                <table  align="center"  style="width: 80%; margin: 0 auto; color:Red;">
                    <asp:Timer ID="Timer1" Interval="1000" runat="server" OnTick="Timer1_Tick">
                    </asp:Timer>
                    <tr>
                        <td class="h2_title" style="color:Red" align="center" >
                            二、竞拍信息
                        </td>
                    </tr>
                
                    </td>
                    </tr>
                </table>
                        
                 </ContentTemplate>
        </asp:UpdatePanel> 
           <asp:UpdatePanel ID="UpdatePanel2" runat="server">
            <ContentTemplate>          <div class="blk_02" id="chg"> 
    <div class="table_title"> 
      <table width="80%" cellspacing="0"> 
        <tbody> 
          <tr> 
            <th width="10%" > 
                 序号 
            </th> 
            <th width="20%"> 
               价格
            </th> 
            <th width="20%"> 
              数量 
            </th> 
              <th width="20%"> 
              金额 
            </th> 
               <th width="30%" align="center"> 
              时间 
            </th> 
          </tr> 
        </tbody> 
      </table> 
    </div> 
    <div class="table_data" id="demo"> 
      <div id="demo1" runat="server" style="  padding:0px">            <asp:Repeater runat=server ID="gv">
        <HeaderTemplate>
             <table   cellspacing="0" rules="all" border="1"  width="80%" >       
        </HeaderTemplate>
        <ItemTemplate>
        
          <tr align="center" >
                        <td width="10%" style=" color:#CCCCCC" >
                               <%#Container.ItemIndex+1%>
                             
                        </td>
                        <td align="center" width="20%" style=" color:#CCCCCC">
                            <%#Eval("Price")%>
                        </td>
                        <td width="20%" style=" color:#CCCCCC">
                            <%#Eval("SubmitNum")%>
                        </td>
                        <td width="20%" style=" color:#CCCCCC">
                            <%#Eval("Bail")%>
                        </td>
                        <td  width="30%" style=" color:#CCCCCC">
                        <%#Eval("CreateTime")%>
                        </td>                    </tr>
      
        </ItemTemplate>
        <FooterTemplate>
          </table>
        </FooterTemplate>
        </asp:Repeater>
      </div> 
    </div> 
  </div>    
     <asp:Timer ID="Timer2" Interval="10000" runat="server" OnTick="Timer2_Tick">
                    </asp:Timer>
                    </ContentTemplate>
                    </asp:UpdatePanel>后台相关代码: 
        protected void Timer1_Tick(object sender, EventArgs e)
        {
        }
        protected void Timer2_Tick(object sender, EventArgs e)
        {
        }
        //页面倒计时的方法
        protected void IsVisible()
        {
            Timer2.Enabled = true;
            Timer2.Interval = 30000;
            Timer1.Interval = 1000;
            Timer1.Enabled = true;