window.onerror

gistfile1

window.onerror = function(message, url, line, col, error) {
    var errMessage = message +
        '\nat: ' + url + ':' + line + ':' + col +
        !!error ? JSON.stringify(error, null, 4) : '';

    if (window.alert) {
        alert(errMessage);
    } else {
        console.log(errMessage);
    }

    return true;
};