客户端部分：
<html>
<head>
<meta http-equiv=Content-Type content=text/html/>
<script language=javascript>
var ajax;
function createAjax()
{
if(window.ActiveXObject)
{
try
{
return new ActiveXObject(Msxm12.XMLHTTP);
}
catch(e)
{
try
{
return new
ActiveXObject(Microsoft.XMLHTTP);
}
catch(e2)
{
return null;
}
}
}
else if(window.XMLHttpRequest)
{
return new XMLHttpRequest();
}
else
{
return null;
}
}
function onRcvData()
{
if(ajax.readyState==4)
{
if(ajax.status==200)
{
var content=document.getElementById('content');
content.innerHTML=ajax.responseText;
}
else
{
alert(error);
}
}
}
function ajaxSendRequest(uri)
{
ajax=createAjax();
if(!ajax)
{
alert(no);
return 0;
}
ajax.onreadystatechange=onRcvData;
ajax.open(GET,uri,true);
ajax.send();
}
</script>
<title>Hello AJAX - </title>
</head>
<body>
<div id=content></div>
<br>
<input type=button value=Hello
onclick=ajaxSendRequest('http://localhost:8080/test/hello.jsp')>
</body>
</html>
服务器端部分(hello.jsp)
<html>
<head>
<title>hellp - </title>
</head>
<body>
<%
out.println(HELLO AJAX);
%>
</body>
</html>