prototype ajax periodupdater 周期性调用
periodupdater.php文件内容：<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="../prototype_1_6.js"></script>
<title>prototype 的Updater</title>
</head>
<body>
<script type="text/javascript">
<!--
var url ="reply_periodupdater.php";
new Ajax.PeriodicalUpdater({success:"div1",failure:'error'},url,{
method:'get',
frequency:2,
decay:2
}
);
//-->
</script>
<br />
<div id="div1"></div>
<div id="error"></div>
</body>
</html>
reply_periodupdater.php文件内容：
<?php
echo mktime();
?>
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