日期:2014-05-17  浏览次数:20569 次

验证码是叉叉,要刷新才能显示,怎么搞?
刷新验证码才会显示,一开始验证码是叉叉。

Login.ascx
HTML code

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="Login.ascx.cs" Inherits="blog.User.Login" %>
<table align="center" cellpadding="0" cellspacing="0" class="style2">
    <tr>
        <td align="center">
            &nbsp;</td>
        <td align="right">
            <asp:Label ID="Label8" runat="server" SkinID="20" Text="用户名:" Width="68px" 
                style="font-size: small"></asp:Label>
        </td>
        <td colspan="2">
                        <span style="font-size: 9pt"><asp:TextBox ID="txtUid" 
                runat="server" Width="105px" Font-Size="9pt"></asp:TextBox></span>
        </td>
        <td>
            &nbsp;</td>
    </tr>
    <tr>
        <td>
            &nbsp;</td>
        <td align="right">
            <asp:Label ID="Label3" runat="server" style="font-size: small" Text="密 码:"></asp:Label>
        </td>
        <td colspan="2">
                        <span style="font-size: 9pt">
                        <asp:TextBox ID="txtPwd" runat="server" Width="105px" 
                TextMode="Password" Font-Size="9pt"></asp:TextBox></span>
        </td>
        <td>
            &nbsp;</td>
    </tr>
    <tr>
        <td>
            &nbsp;</td>
        <td align="right">
            <asp:Label ID="Label9" runat="server" Height="20px" Text="验证码:" Width="67px"></asp:Label>
        </td>
        <td colspan="2">
                        
                <asp:TextBox ID="txtVali" runat="server" Width="105px" Height="16px" ></asp:TextBox>
        </td>
        <td>
            &nbsp;</td>
    </tr>
    <tr>
        <td>
            &nbsp;</td>
        <td colspan="3" align="right">                                     
                    <img src="Vcode.aspx" id="valiCode" alt="验证码" /><a title="刷新验证码" href="" 
                        onclick="javascript:document.getElementById('valiCode').src='User/Vcode.aspx?id='+Math.random();return false;">看不清,请换张图?</a>
        </td>
        <td>
            &nbsp;</td>
    </tr>
    <tr>
        <td>
            &nbsp;</td>
        <td align="right">
            <asp:ImageButton ID="btnLoad" runat="server" CausesValidation="False" 
                Height="21px" ImageUrl="~/Images/Skin/登录_06.jpg" OnClick="btnLoad_Click" 
                Width="55px" />
            </td>
    </tr>
    <tr>
        <td>
            &nbsp;</td>
        <td align="right">
            <asp:ImageButton ID="btnRegister" runat="server" CausesValidation="False" 
                Height="21px" ImageUrl="~/Images/Skin/注册_08.jpg" OnClick="btnRegister_Click" 
                Width="53px" />
        </td>
    </tr>

</table>