function showHide(rootContainer, childContainer) {
    childDivElement = "#" + childContainer;
    rootDivElement = "#" + rootContainer;

    J(childDivElement).toggle(J(childDivElement).css('display') == 'none');

    if (J(rootDivElement).hasClass('arrow_opened')) {
        J(rootDivElement).removeClass();
        J(rootDivElement).addClass('accordion_arrow arrow_closed');
    }
    else {
        J(rootDivElement).removeClass();
        J(rootDivElement).addClass('accordion_arrow arrow_opened');
    }
}