function radio_button_checker()
{
    // set var radio_choice to false
    var radio_choice = false;

    // Loop from zero to the one minus the number of radio button selections
    for (counter = 0; counter < poll.result.length; counter++)
    {
        // If a radio button has been selected it will return true
        // (If not it will return false)
        if (poll.result[counter].checked)
            radio_choice = true;
    }
    if (!radio_choice)
    {
        // If there were no selections made display an alert box
        alert("Wybierz jedną opcję!")
        return (false);
    }
    return (true);
}