!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
html>
head>
title>Ajax的第一個經典例子Hello World/title>
script type="text/javascript">
var xmlHttp;
function createXMLHttpRequest(){
if(window.ActiveXObject){
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest){
xmlHttp = new XMLHttpRequest();
}
}
function startRequest(){
createXMLHttpRequest();
try{
xmlHttp.onreadystatechange = handleStateChange;
xmlHttp.open("GET", "data.xml", true);
xmlHttp.send(null);
}catch(exception){
alert("您要訪問的資源不存在!");
}
}
function handleStateChange(){
if(xmlHttp.readyState == 4){
if (xmlHttp.status == 200 || xmlHttp.status == 0){
// 取得XML的DOM對象
var xmlDOM = xmlHttp.responseXML;
// 取得XML文檔的根
var root = xmlDOM.documentElement;
try
{
// 取得info>結果
var info = root.getElementsByTagName('info');
// 取字符串
var str_data = info[0].firstChild.data;
//改變div的內容，調用changeText函數，注意IE和FF是不一樣的
changeText(info[0].firstChild.data,'showText');
//innerHTML是一樣的
document.getElementById("showTextHTML").innerHTML = 'strong>' + info[0].firstChild.data + '/strong>';
}catch(exception)
{
}
}
}
}
function changeText(str,element){ //兼容IE和FF的
if(navigator.appName.indexOf("Explorer") > -1){
document.getElementById(element).innerText = str;
} else{
document.getElementById(element).textContent = str;
}
}
/script>
/head>
body>
div>
input type="button" value="return ajax responseXML's value"
onclick="startRequest();" />
/div>
div id="showText">/div>
div id="showTextHTML">/div>
/body>
/html>