Callback parameters:
in_url - the path to the page;
in_code - the error code;
in_message - the local message for the error code (different for iOs and Android.
Example:

IR.AddListener(IR.EVENT_BROWSER_PAGE_ERROR, 0, function (in_url, in_code, in_message) {
IR.Log (in_url + " " + in_code + " " + in_message);
})