怎么调aspnetpager里面选中页码的样式

.flip{ width:638px; height:25px; padding:12px 0; margin:26px 0; background-color:#fff; border:1px solid #2182c7;}.flip table{ text-align:center; line-height:25px; margin:0 auto;}.flip a{ height:25px; padding:0 7px; color:#2182c7; font-size:14px; margin:0 5px; display:block; text-decoration:none; float:left;}.flip a:hover{ color:#fff; background-color:#2182c7; text-decoration:none;}.flip span{ height:25px; padding:0 5px; color:#2182c7; font-size:14px; margin:0 5px; display:block; float:left;}.flip_t{ width:25px; padding-left:5px; height:23px; background-color:#fff; border:1px solid #2182c7; color:#2182c7; margin:0 5px; float:left; vertical-align:middle; }.flip_b{ width:25px; height:25px; line-height:25px; background-color:#2182c7; color:#fff; border:0; margin:0 5px; float:left; }.flip_c{ height:20px; padding:0px 5px; color:#2182c7; font-size:14px; margin:0 5px; display:block; float:left;}

<div class="flip">                <table border="0" cellspacing="0" cellpadding="0">                    <tr>                        <td height="25">                            <webdiyer:AspNetPager ID="AspNetPager1" runat="server" AlwaysShow="True"                                OnPageChanging="AspNetPager1_PageChanging" PageSize="6" PageIndexBoxType="TextBox"                                ShowPageIndexBox="Always" PrevPageText="上一页" NextPageText="下一页" FirstPageText="首页"                                LastPageText="尾页" SubmitButtonClass="flip_b" SubmitButtonText="GO" PageIndexBoxClass="flip_t"                                ShowCustomInfoSection="Right" CustomInfoHTML="共%PageCount%页" CustomInfoClass="flip_c"                                CustomInfoSectionWidth="35px" UrlPaging="True" EnableUrlRewriting="true" UrlRewritePattern='/detailed_%fid%_{0}'                                Wrap="False" NumericButtonCount="3" HorizontalAlign="Center" Width="100%">                            </webdiyer:AspNetPager>                        </td>                    </tr>                </table>            </div>