jHeartbeat 使用说明

在下不才，刚接触jquery不久
现在要使用 jHeartbeat 但是不会用
在网上找了这些代码，希望能有朋友帮我加点注释。 谢谢
<script type=”text/javascript” src=”js/jquery.js”></script>
<script type=”text/javascript” src=js/jheartbeat”></script>
<script type=”text/javascript”>
$(document).ready(function(){ $.jheartbeat.set({ url: “data.php”, // The URL that jHeartbeat will retrieve
delay: 1500, // How often jHeartbeat should retrieve the URL
div_id: “test_div” // Where the data will be appended. ,
function (){ // Callback Function }); }); });
</script>