This post 
http://www.jeasyui.com/forum/index.php?topic=1559.0  shows how to place a Google Map in a Tab.  It has fixed lat. and long. but it should be possible to pull this from a database and convert to JSON to display varying map positions.
The CRUD example illustrates how to  get data from a db, load the grid and then, via buttons, display the data in a pop-up form.
I'd like to mirror this with a Google map.  So the user selects a row and clicks a button Refresh Map - this passes the lat. and long. to the pop-up and so causes the map to refresh. The pop-up is non-modal so the user can switch between the form and the map.
Does this sound possible ?  Am I going in the right direction ?   Has anyone done this ?   Any help or suggestions much appreciated !