jQuery Grid Plugin - jqGrid

Hello all. Is it possible to serve the three structures dynamically with JSON and next on client-side tell the plugin,  by means of some property, where in the JSON structure get the colModel, the colNames and the data?

Otherwise how would you implement this?

I was thinking on another way, but it would suppose two requests: the first one to serve the HTML+JS including the necessary colModel and colNames for the current page, and the 2nd one would be the AJAX request made by the plugin to get the data with JSON (this time the JSON response would be just final data).

Any suggestion?