自己弄的一个用户注册控件

reg.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="reg.ascx.cs" Inherits="reg" classname="UIreg"%>
<link href="style.css" type="text/css" rel="stylesheet" />
    <link href="link.css" type="text/css" rel="stylesheet" />
<script language="c#" runat="server">
            DateTime t=DateTime.Now;
            void Page_Load(Object sender,EventArgs e){
             Page.DataBind();}
    void cvlenth(object source,ServerValidateEventArgs args) {
        try
        {
            int i = int.Parse(args.Value);
            string str = i.ToString();
            int tt = str.Length;
            //Response.Write(tt);

            args.IsValid = (tt> 6);
        }
        catch
        {
            args.IsValid = false;
        }
    }
</script>
 <style type="text/css">
<!--
#Layer1 {
 position:absolute;
 width:200px;
 height:262px;
 z-index:1;
 left: 9px;
 top: 5px;
}
#Layer2 {
 position:absolute;
 width:306px;
 height:262px;
 z-index:2;
 left: 222px;
 top: 5px;
}
#Layer3 {
 position:absolute;
 width:200px;
 height:262px;
 z-index:3;
 left: 543px;
 top: 5px;
}
-->
 </style>
 <div>
<div id="Moutside" class="Moutside">
  <div id="top" class="topside">
    <img src="images/top.gif" width="754" height="201" />
    <div class="logo" id="logo"><img src="images/logo.jpg" width="165" height="95" />立足世界 面向未来</div>
 <div id="Navigation" class="Navigation" style="left: 213px; top: 13px; height: 23px">首页<img src="images/logo_02.gif" width="24" height="15" />学习天堂<img src="images/logo_02.gif" alt="111111" width="24" height="15" />充值中心<img src="images/logo_02.gif" alt="111111" width="24" height="15" />客户服务<img src="images/logo_02.gif" alt="111111" width="24" height="15" />交流论坛<img src="images/logo_02.gif" alt="111111" width="24" height="15" />情景会话<img src="images/logo_02.gif" alt="111111" width="24" height="15" />旧版<img src="images/logo_02.gif" alt="111111" width="24" height="15" /></div>
 <div id="datatime" class="datatime" style="left: 4px; top: 164px"><asp:Label ID="Nowtime" runat="server" Text=<%# t %>></asp:Label></div>
  </div>
  <div class="banner" id="banner" style="left: 0px; top: 204px">
    <div id="banner1" class="banner1">banner
       
    </div>
    <div id="banner2" class="banner2" style="left: 0px; top: 41px">
      <asp:AdRotator ID="ADROTATOR1" Target="_blank" AdvertisementFile="ad.xml" runat="server" /></div>
  </div>
  <div id="Columns" class="Columns" style="left: 0px; top: 308px;">
    <div id="Layer1">
        <asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" ControlToValidate="txtuser"
            Display="Dynamic" ErrorMessage="无效用户名" ValidationExpression="[a-z]*."></asp:RegularExpressionValidator><br />
        <asp:CustomValidator ID="cv" runat="server" ControlToValidate="txtpwd" ErrorMessage="密码长度不够" OnServerValidate="cvlenth" Display="Dynamic"></asp:CustomValidator><br />
        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtpwd"
            Display="Dynamic" ErrorMessage="密码不能为空"></asp:RequiredFieldValidator><br />
    </div>
    <div id="Layer2">
        <asp:Label ID="Label1" runat="server" Text="*输入用户名："></asp:Label><br />
        <asp:TextBox ID="txtuser" runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator ID="userValidator1" runat="server" ErrorMessage="请输入用户名" ControlToValidate="txtuser" Display="Dynamic"></asp:RequiredFieldValidator><br />
        <asp:Label ID="Label2" runat="server" Text="*输入密码"></asp:Label><br />
        <asp:TextBox ID="txtpwd" runat="server" TextMode="Password"></asp:TextBox>
<br />
        <asp:Label ID="Label3" runat="server" Text="*重复密码"></asp:Label>
        <asp:CompareValidator ID="CompareValidator1"
             runat="server"
             ErrorMessage="密码必须输入" ControlToValidate="txtpwd" ControlToCompare="txtrepwd" Type="String" Operator="equal" Display="Dynamic">两次输入的密码不一致
        </asp:CompareValidator><br />
        <asp:TextBox ID="txtrepwd" runat="server" TextMode="Password"></asp:TextBox>
        <br />
        <asp:Label ID="Label4" runat="server" Text="*输入你的邮箱地址"></asp:Label><br />
        <asp:TextBox ID="txtmail" runat="server"  Width="120px"></asp:TextBox>
        <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtmail"
            Display="Dynamic" ErrorMessage="您输入的邮箱地址不正确" ValidationExpression="/w+([-+.']/w+)*@/w+([-.]/w+)*/./w+([-.]/w+)*"></asp:RegularExpressionValidator><br />
        <br />
        <asp:ImageButton ID="ImageButton1" runat="server" Height="22px" Width="69px" ImageUrl="~/images/reg.gif" /></div>
    <div id="Layer3">
 <li>本站会员 ID 只能由 英文字母a~z、数字0~9、下划线 组成。</li>
 <li> 本站会员 ID 的 起始字符 必须是 英文字母。如: example_2005。</li>
 <li>密码不少于6个字符，区分大小写。</li>
 </div>
  </div>
  <div id="friend" class="freind"></div>
  <div id="bottom" class="bottom">copyright@2006 LnyABC http://www.lnyabc.com lnc.All rights reserverd</div>
</div>
    <div id="link" class="link">友情链接</div>
 </div>