My application is a real-time apps using ajax environment. It is a live picking of schedule. The users want see the available slot in real-time way. such that they can see other ticking schedule. And i'm using ajax to replace the element with the new one. Example:
$.get(my_url, function(data){ $('#area').innerHTML(data); });
On success the element with an ID 'area' will be replaced with the new generated html response so that it looks 'real-time'.