我的代码如下:
<table> 
<tr>
<td>品牌:</td>
  <td>
<asp:Button ID="btnAllProdTag" runat="server" Text="全部" /></td>
  <td>
 <asp:CheckBoxList ID="cblProdTag" runat="server" AutoPostBack="True" Font-Size="12pt"RepeatDirection="Horizontal"    onselectedindexchanged="cblProdTag_SelectedIndexChanged">
</asp:CheckBoxList>                                                                  </td>                                                                  
</tr>
</table> 
现在我只要一选CheckBoxList 页面就会上下动 如何固定它?