자료출처 : http://www.parkoz.com/zboard/view.php?id=my_tips&no=7535
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<SCRIPT language="JavaScript">
setTimeout("history.go(0);", 30000);
</SCRIPT>
</HEAD>
<center>
<BODY leftmargin="0" marginwidth="0" topmargin="0" marginheight="0">
<iframe name=iframe1 src="새로고침URL주소" width=90% height=90%>
</iframe>
</BODY>
</center>
</HTML>