1 <script type="text/javascript">
2 window.onload = function(){
3 var btn = document.getElementById("btn");
4 var pcontent = document.getElementById("content");
5 //获取XMLHttpRequest 兼容各种浏览器 包括IE6,IE5
6 function getXmlHttp(){
7 if(window.XMLHttpRequest){
8 return new XMLHttpRequest();
9 }else if( window.ActiveXObject){
10 var version = [
11 "MSXML2.XMLHttp.6.0",
12 "MSXML2.XMLHttp.3.0",
13 "MSXML2.XMLHttp"
14 ];
15 for(var i=0;i<version.length;i++){
16 try { return new ActiveXObject(version[i]);}catch (e) {}
17 }
18 }else{
19 alert("您的浏览器不支持XMLHttp");
20 }
21 }
22 btn.onclick = function(){
23 var xmlHttp = getXmlHttp();
24 xmlHttp.onreadystatechange = function(){
25 if(xmlHttp.readyState == 4 ){
26 if(xmlHttp.status == 200){
27 pcontent.innerHTML = xmlHttp.responseText;
28 }else{
29 alert("错误信息:"+ xmlHttp.statusText);
30 }
31 }
32 }
33 xmlHttp.open("GET","data.txt",true);
34 xmlHttp.send(null);
35 }
36
37 }
