ถ้าต้องการให้แจ้งเตือนแบบ Realtime ด้วย AJAX แบบนี้มีแนวทางประมาณไหนครับ

<script src="http://code.jquery.com/jquery-latest.js"></script><script>
function getDataFromDb()
{
	$.ajax({ 
				url: "get.php" ,
				type: "POST",
				data: ''
			})
			.success(function(result) { 
				var obj = jQuery.parseJSON(result);
					if(obj != '')
					{
						 $.each(obj, function(key, val) {
							 if(val["sumall"]>0)
							 {
						 $(".divDetail").html("!");
							 }
						 });
						
						  
					}

			});
}
setInterval(getDataFromDb, 1000);   // 1000 = 1 second
</script>
<!-- แสดงผลแบบ Realtime-->
<span style="color:#fff;background-color:red;" class="divDetail badge"></span>

$host="localhost";
	$user="root";
	$pass="1234";
	$dbname="Namedatabase";
	$conn = mysql_pconnect($host,$user,$pass);
mysql_query("SET character_set_results = 'utf8', character_set_client = 'utf8', character_set_connection = 'utf8', character_set_database = 'utf8', character_set_server = 'utf8'", $conn);
	mysql_select_db($dbname);
$strSQL = "SELECT count(*) as sumall FROM tbl_order where Alert_orderadmin=0";
	$objQuery = mysql_query($strSQL) or die (mysql_error());
	$intNumField = mysql_num_fields($objQuery);
	$resultArray = array();
	$obResult = mysql_fetch_array($objQuery);
	{
		$arrCol = array();
		for($i=0;$i<$intNumField;$i++)
		{
			$arrCol[mysql_field_name($objQuery,$i)] = $obResult[$i];
		}
		array_push($resultArray,$arrCol);
	}
	
	mysql_close($conn);
	
	echo json_encode($resultArray);