Comet Programming: the Hidden IFrame Technique

Comet Programming: the Hidden IFrame Technique: "As covered in Comet Programming: Using Ajax to Simulate Server Push, Comet is a Web application model that enables Web servers to send data to the client without having to explicitly request it. Hence, the Comet model provides an alternate mechanism to classical polling to update page content and/or data. In that article, we learned how to use XMLHttpRequest long polling to refresh page components and keep cached data in synch with the server."