iframe content zoom in and zoom out jquery

1var anOtherOnZoomFunction = function(info) {
2	console.log(info);
3};
4
5$.axZm.userFunc = $.fn.axZm.mergeCallBackObj($.axZm.userFunc, {
6	onZoom: anOtherOnZoomFunction
7});
8
9// or like this when AJAX-ZOOM is already initialized:
10$.fn.axZm.addCallback('onZoom', anOtherOnZoomFunction);