是一个适宜某项免费素材下载 jHeartbeat

jHeartbeat 是一个jQuery 的插件，用来按时执行某项义务，例如按时向效劳器发送申请；按时更新页面元素等等，特地适宜用正在谈天室开发上。
应用办法：
[code]
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src=js/jheartbeat.js"></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>
[/code]