Uncaught TypeError: Cannot call method 'push' of undefined
It's not really easy to tell, but basing on a comments, the object you're calling push method on is probably undefined. And this object should be an array.
Replace this line:
layer[result['layerId']].push(result);With following code:
if("undefined" != typeof layer[result['layerId']]) { layer[result['layerId']].push(result);}else { layer[result['layerId']] = new Array(); layer[result['layerId']].push(result);}Let me know if it works.