javascr ipt/js的ajax的GET请求：
[removed]
/* 创建 XMLHttpRequest 对象 */
var xmlHttp;
function GetXmlHttpObject(){
if (window.XMLHttpRequest){
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}else{// code for IE6, I
login.onclick = function(){
var xhr = new XMLHttpRequest();
xhr.open("get","http://localhost/ajax2/test2.php?username="+username.value+"&pwd="+pwd2.value,true);
xhr.send();
xhr.onreadystatechange = function(){
if (xhr.readyState == 4) {
if (xhr.statu
