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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>AJAX</title>
</head>
<body>
<p>点击获得内容</p>
<input type="button" id="Btn_ajax" value="GET">
<span id="content"></span>
<script type="text/javascript">
window.onload=function(){
var btn=document.getElementById("Btn_ajax");
var content=document.getElementById("content");
var request=null;
if(window.XMLHttpRequest){
request=new XMLHttpRequest();
}else{
request=new ActiveXObject("Microsoft.XMLHTTP");
}
btn.onclick=function(){
request.open('GET','localhost:8080/Ajax/1.txt',true);
request.send();
request.onreadystatechange=function(){
if(request.readyState==4){
if(request.status===200){
content.innerHTML=request.responseText;
}else{
alert("error:"+request.status);
}
}
}
}
}
</script>
<!-- <script src="localhost:8080/ajax/1.txt?callback=showtext"></script> -->
</body>
</html>