AJAX
- AJAX: Asynchronous JavaScript and XML
- AJAX 允许浏览器与服务器之间进行发送和接收数据
表单页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>表单页面</title>
<script>
function onClick() {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("result").innerHTML = xmlhttp.responseText;
}
};
xmlhttp.open("GET", "result.php", true);
xmlhttp.send();
}
</script>
</head>
<body>
<button type="button" onclick="onClick();">点击</button>
<span id="result"></span>
</body>
</html>
PHP页面
<?php
echo "Hello, AJAX!";
?>