代码：
实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>ajax无刷新验证</title>
</head>
<body>
<h2>用户登录</h2>
<form>
<p>用户：<input type="text" name="name" ></p>
</form>
</body>
</html>
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">
$(':input').blur(function(){
// console.log('tt')
$.ajax({
//请求的服务器资源,必须是字符串
url: 'api/demo.php',
type: 'GET',
data: $('form:first ').serializeArray(),
//成功回调
success: function(msg,status,xhr) {
console.log(msg)
$('p span').empty()
$('p').append($(msg))
}
})
})
</script>运行实例 »
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手写代码：
