function $() {
    var elements = new Array();

    for (var i = 0; i < arguments.length; i++) {
        var element = arguments[i];

        if (typeof element == 'string')
            element = document.getElementById(element);

        if (arguments.length == 1)
            return element;

        elements.push(element);
    }

    return elements;
}

function toggleDiv( element ) {
    var e = $(element);

    if (e) {
        e.style.display = ((e.style.display != 'block') ? 'block' : 'none');
        $('div_upper_right').innerHTML = _description[e.id]();
    }
}