Went through a bunch of code and found AjxRpc.blahblah. I found a note in the source tomcat\webapps\zimbra\
js\ajax\net\AjxRpc.
js. The note said one of the parameters is useGet.
function(requestStr, serverUrl, requestHeaders, callback, useGet, timeout)
If this parameter is omitted it defaults to post.
-----Note----
* @param {Boolean} useGet if true use get method, else use post. If ommitted
* defaults to post
-----End Note-----
Now I just have to put all the pieces together and see if it will pass to the server. Going to bed now. Leaving this till tomorrow.