// calls when the user clicks submit
function validate () {
	var $a = checkRadios ();
	if ($a) {
		// all ok submit form
		document.form.submit ();
	} else {
		window.alert ('You need to select an option to vote!');
	}
}

// cycles the radio buttons for a valid entry
function checkRadios () {
	for (var $j=0; $j<document.form.poll.length; $j++) {
		if (document.form.poll[$j].checked) {
			return ($j + 1);
		}
	}
	return (false);
}