验证码无刷新更换

aspx页面:

View Code
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="JsSafeCode._Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server">    <title></title>    <script type="text/javascript">        function reloadcode() {            document.getElementById('imgCode').src = 'checkCode.aspx?' + Math.random();        }             </script></head><body>    <form id="form1" runat="server">    <div>        <asp:TextBox ID="txtCode" runat="server" Width="80"></asp:TextBox><img src="checkCode.aspx"            id="imgCode" onclick="reloadcode()" alt="点击刷新验证码" style="cursor: pointer" />        <asp:Button ID="btnTest" runat="server" Text=" 验 证 " OnClick="btnTest_Click" />    </div>    </form></body></html>

 

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