<html><head> <title>未命名頁面</title>
<script language="javascript" type="text/jscript">
/* 定義一個未初始化的對象 */
var xmlhttp; function createRequest() { // IE OR NOT if(window.ActiveXObject) { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} else if(window.XMLHttpRequest) { xmlhttp = new XMLHttpRequest(); } } function GetValue() { createRequest(); xmlhttp.onreadystatechange = statechangeLoad; xmlhttp.open("GET","Default.aspx", true); xmlhttp.send(null); } function statechangeLoad() { // 如果請求已經完成 if(xmlhttp.readystate == 4) { // 判斷請求是否成功返回 if(xmlhttp.status == 200) { // 調用返回處理函數 document.getElementById("txtShowValue").value = xmlhttp.responseText; } } } 
</script></head><body> <form id="form1" runat="server"> <div> <input id="btnGetValue" type="button" value="Click me" onclick="GetValue();"/> <input id="txtShowValue" type="text" /> </div> </form></body></html>protected void Page_Load(object sender, EventArgs e) { StringBuilder mystr = new StringBuilder(); mystr.Append("Hello, Ajax!"); Response.Write(mystr); }