function valPoll()
{
    var totRad = document.FrmPoll.poll_answer.length;
    var selected = 0;

    for (var i=0; i<totRad; i++)
    {
        if (document.FrmPoll.poll_answer[i].checked == true)
            selected = selected + 1;
    }

    if (selected == 0)
    {
        alert("Select an answer");
    }

    if (selected == 1)
    {
        document.FrmPoll.submit();
    }
}