一:Ajax思路:
?? 1: send_request('sample1_2.jsp?username='+username);
?? 2:?? http_request = new ActiveXObject("Msxml2.XMLHTTP");
?? 3:http_request.onreadystatechange = processRequest;
?? 4:http_request.open("GET", url, true);
??? http_request.send(null);
? 5:if (http_request.readyState == 4)
??? if (http_request.status == 200)
?說明:alert(http_request.responseText);返回整個頁面內容