[web-devel] [Newbie] Basic concepts around passing a JSON value to a JQuery function for processing.

Not only am I new to Haskell and Yesod, but now I find I need JQuery and have some conceptual questions. The stiuation I have is I am trying to build a status page that will either give information about a live server, or an alert saying that it's down. I want to have a BOOL to pass. How do I go about passing values from my Yesod program to an JQuery function?