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老师批语：
代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>作业</title>
<script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$(':input').blur(function() {
$.ajax({
url: 'api/demo.php',
type: 'GET',
data: $('form').eq(0).serializeArray(),
success: function(msg, status, xhr) {
$('p span').empty()
$('p').append($(msg))
}
})
})
})
</script>
</head>
<body>
<h2>用户注册</h2>
<form>
<p>用户名:
<input type="text" name="name">
</p>
</form>
</body>
</html>点击 "运行实例" 按钮查看在线实例
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