在我的页面刷新部分

I'm trying to refresh this part of the page

<div class="refresh">
    <?php
    include("message.php");
    ?>
</div>

with this code :

<script type="text/javascript">
    var auto_refresh = setInterval(
        function () {
            $('#refresh').empty();
            $('#refresh').load('message.php');
        }, 500);
</script>

Could you help me?

change this

<div class="refresh">

<div id="refresh">

because you are using id selector in jquery to load the content.

if you are using $('#refresh') then "#" represents the id, so change this

<div class="refresh">

<div id="refresh">

or change this

$('#refresh')

$('.refresh').