I'm wondering about the pros and cons of handling the auto-updating of a `<div>` on server vs. client side. I'm using Apache with PHP but was just thinking of faking a push notification in Javascript like this:

```
setInterval(queryDatabaseForUnreadMessages, 60000);

function queryDatabaseForUnreadMessages(){
   $.ajax({
       url: "/messages/queryDatabaseForUnreadMessages",
       success:function(data){
          $('div#littleRedCircle').html(data);
       }
   });
}

```

I'd just like to set up a notification like Stackoverflow has done (little red circle with a number in it) to let people know they've received a new message if one exists. Is that simple AJAX/setInterval combo a bad idea?