gistfile1.js

_onSuccess : function (txId, r, args) {
	
	var entity = r.responseText;
	
	if (entity && entity.length > 0) {
		try {
			entity = Y.JSON.parse(entity);
		} catch (e) {}
	}
	
	if (Y.Lang.isObject(entity) || Y.Lang.isArray(entity) {
		// successful JSON parse
	} else if (Y.Lang.isString(entity) {
		// doesn't look like we could parse the responseText as JSON, but we still have a String to work with
	}
}