지정된 날짜에만 팝업창 열기

<?
$nowDay = date("Y-m-d",time());
$startDay = "2014-10-01";
$endDay = "2014-10-31";

if($startDay <= $nowDay && $endDay >= $nowDay) { ?>

<script type="text/javascript">
	window.open('open.html', '_blank', 'width=100, height=100, left=0, top=0, scrollbars=no, status=no');
</script> 
<? } ?>