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代码利用$.ajax实现了无刷新的实时在线验证
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>ajax</title>
</head>
<body>
<form style="width: 450px">
<fieldset>
<legend><h2>login</h2></legend>
<p>name:<input type="text" name="name"></p>
</fieldset>
</form>
</body>
</html>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script type="text/javascript">
$(':input').on('input',function(){
$.ajax({
url:'login.php',
type :'POST',
// dataType:'jsonp',
async:'true',
data:$('form:first').serializeArray(),
success:function(msg,status,xhr){
// console.log(msg)
$('p span').remove()
$(msg).appendTo('p')
}
})
})
</script>点击 "运行实例" 按钮查看在线实例
总结：$.ajax(url,type,data,dataType,success,error) 请求加载远程数据
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