That is why I asked for a demo code ;) Maybe I just write a mistake in the codes.
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I figured out how to auto popup.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Auto Popup</title>
<link rel="stylesheet" href="style.css" />
<script type="text/javascript" src="tinybox.js"></script>
<title></title>
</head>
<body>
<p>Auto Popup should appear.
<script type="text/javascript">window.onload = function(){TINY.box.show('popup.html',1,0,0,1)};
</script></p>
</body>
</html>