<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="result"></div>
<div>
<form action="">
用户名：<input type="text" id="username" value="admin">
密码：<input type="password" id="password" value="123456">
<input type="button" value="登录" id="btn">
</form>
</div>
</body>
</html>
<script>
window.onload = function(){
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
var btn = document.getElementById("btn");
btn.onclick = function(){
var xhr = null;
if(window.XMLHttpRequest){
xhr = new XMLHttpRequest();
}else {
xhr = new ActiveXObject("Mcrosoft XMLHTTP");
}
url = "./request.php?username="+username+"&password="+password;
xhr.open("get",url,true);
xhr.send(null);
xhr.onreadystatechange = function(){
if(xhr.readyState == 4){
if(xhr.status == 200){
var data = xhr.responseText;//xhr.responseText获取到了被请求的PHP代码，为什么？
// alert(data);
// if(text == 1){
// document.getElementById("result").innerHTML = "login success";
// }
// if(text == 2){
// document.getElementById("result").innerHTML = "login faild";
// }
}
}
}
}
}
</script>
<?php
$username = $_GET['username'];
$password = $_GET['password'];
if($username == 'admin' && $password == '123456'){
echo 1;
}else{
echo 2;
}
?>
