W3School TIY Editor

<form runat="server">
<table>
<tr>
<td>
<table bgcolor="#b0c4de" cellspacing="10">
   <tr>
     <td align="right">名字：</td>
     <td><asp:TextBox id="txt_name" runat="server"/></td>
     <td>
     <asp:RequiredFieldValidator
     ControlToValidate="txt_name"
     ErrorMessage="Name"
     Text="*"
     runat="server"/>
     </td>
   </tr>
   <tr>
     <td align="right">卡片类型：</td>
     <td>
     <asp:RadioButtonList id="rlist_type"
     RepeatLayout="Flow"
     runat="server">
     <asp:ListItem>Diners</asp:ListItem>
     <asp:ListItem>MasterCard</asp:ListItem>
     <asp:ListItem>Visa</asp:ListItem>
     </asp:RadioButtonList>
     </td>
     <td>
     <asp:RequiredFieldValidator
     ControlToValidate="rlist_type"
     ErrorMessage="Card Type"
     InitialValue=""
     Text="*"
     runat="server"/>
     </td>
   </tr>
   <tr>
     <td></td>
     <td><asp:Button id="b1" Text="提交" runat="server"/></td>
     <td></td>
   </tr>
</table>
</td>
</tr>
</table>
<asp:ValidationSummary
ShowMessageBox="true"
ShowSummary="false"
HeaderText="您必须在下面的字段中输入值："
EnableClientScript="true"
runat="server"/>
</form>

</body>
</html>