1.介绍
2.方法
3.程序位置设计
4.程序（针对XMLHttpRequest）
1 <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
2 pageEncoding="ISO-8859-1"%>
3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
4 <html>
5 <head>
6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
7 <title>Insert title here</title>
8 <script type="text/javascript">
9 window.onload=function(){
10 document.getElementsByTagName("a")[0].onclick=function(){
11 //new XMLHttpRequest
12 var request=new XMLHttpRequest();
13
14 var url=this.href;
15 var method="GET";
16
17 request.open(method,url);
18 request.send(null);
19
20 request.onreadystatechange=function(){
21 if(request.readyState==4){
22 if(request.status==200||request.status==304){
23 alert(request.responseText);
24 }
25 }
26 }
27 return false;
28 }
29 }
30 </script>
31 </head>
32 <body>
33 <a href="helloAjax.txt">hello click</a>
34 </body>
35 </html>
二.解释
1.发送函数
2.onreadystatechange处理函数
3.open方法
三：相应接受
1.接受函数
2.readState
3.reponseText方法
4.reponseXML
四：添加时间戳
1.url
var url=this.href+"?time="+new Date();
五：注意点（post方法）
1.知识点
2.程序
1 <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
2 pageEncoding="ISO-8859-1"%>
3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
4 <html>
5 <head>
6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
7 <title>Insert title here</title>
8 <script type="text/javascript">
9 window.onload=function(){
10 document.getElementsByTagName("a")[0].onclick=function(){
11 //new XMLHttpRequest
12 var request=new XMLHttpRequest();
13
14 var url=this.href;
15 var method="POST";
16
17 request.setRequestHeader("ContentType","application/x-www-form-urlencoded");
18
19 request.open(method,url);
20 request.send("name=‘tom‘");
21
22 request.onreadystatechange=function(){
23 if(request.readyState==4){
24 if(request.status==200||request.status==304){
25 alert(request.responseText);
26 }
27 }
28 }
29 return false;
30 }
31 }
32 </script>
33 </head>
34 <body>
35 <a href="helloAjax.txt">hello click</a>
36 </body>
37 </html>
时间： 2024-08-24 05:39:08