<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>Ajax Hello world </title>
<script type="text/javascript">
var xmlHttp;
//XMLHttpRequest對象初始化
function createXMLHttpRequest(){
if(window.ActiveXObject){
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest){
xmlHttp = new XMLHttpRequest();
}
}
//按鈕事件
function startRequest(){
createXMLHttpRequest();
try{
//xmlHttp狀態改變觸發器綁定事件
xmlHttp.onreadystatechange = handleStateChange;
xmlHttp.open("GET","data.txt",true);
xmlHttp.send(null);
}
catch(exception)
{
alert("您訪問的資源不在");
}
}
function handleStateChange(){
if(xmlHttp.readyState == 4){
//if(xmlHttp.status == 200 || xmlHttp.status ==0){
//顯示返回結果
alert("responseText's value:"+xmlHttp.responseText);
//}
}
}
</script>
<body>
<div>
<input type="button" value="return" οnclick="startRequest();"/>
</div>
</body>
</html>
