前台代码:
HTML code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default4.aspx.cs" Inherits="Default4" %>
<!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">
var xmlHttp;
function createXMLHttpRequest() {
if (window.ActiveXObject) {//判断是否是IE核心浏览器
var activexName = ["MSXML2.XMLHTTP", "Microsoft.XMLHTTP"];
for (var i = 0; i < activexName.length; i++) {
try {
xmlHttp = new ActiveXObject(activexName[i]);
break;
} catch (e) {
}
}
} else if (window.XMLHttpRequest) {//判断是否是标准DOM浏览器(如火狐就是标准DOM浏览器)
xmlHttp = new window.XMLHttpRequest();
}
}
function startRequest() {
createXMLHttpRequest();
xmlHttp.open("get", "Default4.aspx", true);
xmlHttp.onreadystatech
HTML code:
<div>
<asp:TextBox runat="server" ID="txt"></asp:TextBox>
<img src="pic.aspx" alt="点击更换图片!" onclick=&quo ......
