Convert Site with messenger to work like facebook

Hello I'm creating a site at the moment ( mvc) which has a div at the bottom side of the page that works as a messenger.

I would like to find a way to make the site work like facebook's chat. In other words, when a user clicks on a link on the site to load the content on the back however the messenger to stay in tact without loading again.

Will I have to change the site so every page is loaded with an ajax request? Also, I don't want to use iframes.
Bill StavroulakisAsked:
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AJAX is the only way I can think of to do what you want.  AJAX will not require a refresh in that portion of the screen, but keeps all data in memory on the client so that a trip back to the server isn't necessary every time.

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