function init() {
    OAT.Dom.hide("dimmer");
    $("dimmer").style['visibility'] = "visible";
}

function count_total() {
    var count = $("count").value;
    var num   = new Number(count);

    if ((isNaN(num)) || (num < 1)) {
	$("total_currency").style['visibility'] = "hidden";
        var total = 'Zadejte číslo větší než 1';
	var total_eur = '1';
    } else {
        if ($("radio_full").checked) {
            var field = 'price_full';
	} else if ($("radio_half").checked) {
            var field = 'price_half';
	} else if ($("radio_paper").checked) {
            var field = 'price_paper';
	} else if ($("radio_bfull").checked) {
            var field = 'price_bfull';
	} else if ($("radio_bhalf").checked) {
            var field = 'price_bhalf';
	}
        var field_eur = field + '_eur';

        var total = (count * $(field).value);
        var total_eur = (count * $(field_eur).value).toFixed(2);
	$("total_currency").style['visibility'] = "visible";
    }

    $("total").innerHTML = total;
    $("total_eur").innerHTML = total_eur;
}