var groupSiteClosed = true;

function switchGroupSiteOn() {
    $('sitigruppo_back').style.display = 'block';
    $('sitigruppo').style.display = 'block';
    groupSiteClosed = false;
}

function switchGroupSiteOff() {
    $('sitigruppo_back').style.display = 'none';
    $('sitigruppo').style.display = 'none';
    groupSiteClosed = true;
}

function switchGroupSite() {
    if (groupSiteClosed) {
        switchGroupSiteOn();
    } else {
        switchGroupSiteOff();
    }
}