function Harmonika(buttonClass, contentClass, openedClass) {
    $("div." + buttonClass).click(function() {
        if ($(this).next().is(':visible')) {
            $(this).next().slideUp('normal');
            $(this).removeClass(openedClass);
        }
        else {
            $(this).next().slideDown('normal');
            $(this).addClass(openedClass);
        }
    });
    $("div." + contentClass).hide();
}

$(document).ready(function() {
    //defaultni harmonika
    Harmonika("harmonikaButton", "harmonikaContent", "harmonikaOpened");
});