php根据时间调用不同商务通js

<?php$starttime =  mktime(02,00,00);$endtime =  mktime(22,00,00);?><?phpif(time() > $starttime && time() < $endtime){?><script language="javascript" src="http://awt.zoossoft.com/JS/LsJS.aspx?siteid=AWT88888888&float=1&lng=cn"></script><?php}else{?><script language="javascript" src="http://pet.zoosnet.net/JS/LsJS.aspx?siteid=pet88888888&float=1&lng=cn"></script><?php}?><script type="text/javascript">    var r=encodeURIComponent(document.referrer);    window.onload(openZoosUrl('chatwin','&e='+r))</script>