代码
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>3.$.ajax()</title>
</head>
<body>
<h2>用户登录</h2>
<form id="form">
<p id="ptext">用户名:<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(){
$.ajax({
url: 'data.php',
data: $('#form').serialize(),
success: function(msg){
$('span').empty()
$('#ptext').append(msg)
}
})
})
</script>
