function validation ()
{
    var errors = '';

    $.get("php/check_antibot.php?sec_code=" + $('#sec_code').val(), function(data){
        if ('f' == data){
            errors += "Please enter valid Captcha\n";
        }
        if ('' != errors) {
            alert(errors);
            return false;
        } else {
            $('form').submit();
        }
    });
    return false;
}