客户端：
<script type="text/javascript">
window.onload = initPage; function initPage()
{
var btn = document.getElementById("btnOK");
btn.onclick = function ()
{
getDetails(this.title);//按钮单击发送请求
}
} function getDetails(obj)
{
request = createRequest(); //创建请求对象
if (request == null)
{
alert("没有请求对象！");
return;
}
var url = "DetailForm.aspx?title=" + escape(obj);//向何处发请求
request.open("GET", url, true); //请求方式
request.onreadystatechange = displayDetails;//函数引用，设置回调函数
request.send(null);//没有随请求发送额外东西
} function displayDetails()
{
if (request.readyState == 4)
{
if (request.status == 200)
{
document.getElementById("btnOK").value = request.responseText;
} }
}
function createRequest()
{
try
{
request = new XMLHttpRequest();
} catch (tryMS)
{
try
{
request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (otherMS)
{
try
{
request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (failed)
{
request = null;
}
}
}
return request;
} //完全看不到页面的刷新，却从服务器端拿回了数据！
</script>
<body>
<form id="form1" runat="server">
<div>
<input type="button" id="btnOK" value="Ok" title="确定" />
</div>
</form>
</body>
服务端：
public partial class DetailForm : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string str = Request.QueryString["title"];
if (str != null && str != "")
{
Response.Write("new_" + str);
}
else
{
Response.Write("nothing");
}
Response.End();
}
}