请高手给改一下这个代码
源代码<%@ page language="C#" autoeventwireup="true" inherits="_Default, App_Web_default.aspx.cdcab7d2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.
<html xmlns="http://www. >
<head id="Head1" runat="server">
<title>域帐户密码修改</title>
</head>
<body style="text-align: center" topmargin=0>
<form id="form1" runat="server">
<asp:Label ID="Label6" runat="server" Text="用户名只用输入帐户名即可：如 carl_zhang" Font-Size="10pt"></asp:Label><br />
<br />
<asp:Label ID="Label1" runat="server" Text="用户名" Font-Size="10pt"></asp:Label>
<asp:TextBox ID="TextBox1" runat="server" Width="120px"></asp:TextBox>
<br />
<br />
<asp:Label ID="Label2" runat="server" Text="旧密码" Font-Size="10pt"></asp:Label>
<asp:TextBox ID="TextBox2" runat="server" TextMode="Password" Width="120px"></asp:TextBox><br />
<br />
<asp:Label ID="Label3" runat="server" Text="新密码" Font-Size="10pt"></asp:Label>
<asp:TextBox ID="TextBox3" runat="server" TextMode="Password" Width="120px"></asp:TextBox><br />
<asp:Label ID="Label7" runat="server" Font-Size="10pt" Text="确认："></asp:Label>
<asp:TextBox ID="TextBox5" runat="server" TextMode="Password" Width="120px"></asp:TextBox><br />
<br />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="修改" Height="29px" Width="53px" />
<br />
<br />
<br />
<asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="测试" ForeColor="Gray" title="只用输入旧密码, 点击测试帐户状态" />
<asp:Button ID="Button3" runat="server" OnClick="Button3_Click" Text="指令" ForeColor="DimGray" Visible="False" />
<br />
<asp:TextBox ID="TextBox4" runat="server" Visible="False"></asp:TextBox>
<br />
<br />
<div id="foot" style="font-size:9pt" align=center><asp:Label ID="Label4" runat="server"></asp:Label>
<asp:HyperLink ID="HyperLink1" runat="server"></asp:HyperLink>
<asp:Label ID="Label5" runat="server"></asp:Label><br />
</div>
</form>
</body>
</html>
代码中新密码只有1栏，想修改成2栏新密码，带效验的那种，请高手帮忙
