Оповещение о новом сообщении

if (isset($_SESSION['login'])){
$sql = mysql_connect("localhost","root","");
mysql_select_db("vol_base");
mysql_query("SET NAMES 'utf8'");
$polz=mysql_query("SELECT `id_person`, `login` FROM `users_sys` WHERE `login`='".$_SESSION["login"]."'");
$polz=mysql_fetch_assoc($polz);
$polzov=$polz['id_person'];
 
$bag= mysql_fetch_array(mysql_query ("SELECT COUNT(*) as coun FROM  `segment_request` WHERE `id_person`='".$polzov."' AND `ud_req`='0' and `read`='0' "));
     $coun=$bag['coun'];
     echo "<script type='text/javascript' src='jquery.js'></script>
<link rel='stylesheet' type='text/css' href='jquery.alerts.css' />
<script type='text/javascript' src='jquery.alerts.js'></script><script type='text/javascript'>
 
var timerI = 120;
function reset() {
    timerI = timerI - 1;
    if (timerI >= 0) $('#tim').text('(' + timerI + ' c.)');
    if (timerI == 0) window.location.replace(window.location);
}
$(document).ready(function(){
    setInterval('reset()', 1000);
})
</script>
" ;
if ($coun>'0')
{ echo "<embed src='door_bell.mp3' hidden='true' height='1' width='1' loop='0'></embed><script type='text/javascript'>$(document).ready(function(){var zap =jConfirm('Количество новых заявок: '+$coun,'Уведомление',function(zap){if(!zap=='0') 
    {location.href='et_request.php?id=".$polzov."';}
    
    });});
    </script>
    
 
    ";
}