comet style application with PHP, Mysql, jquery

i want to develop a PHP applications(2 sites).in which one site users will place the orders, and in other application admin people will monitor the orders and take necessary actions like accept or reject etc. in the admin page with out reloading need to get latest orders and display.

i have ideas to do this are
1. call ajax repeatedly with setinterval
2. long pooling with ajax.

i did not want to consider these 2 ideas, please help me is there any other way to do this.