function ShowHide(id) {
    obj = document.getElementsByTagName("div");
    if (obj[id].style.visibility == 'visible'){
        obj[id].style.visibility = 'hidden';
        obj[id].style.height = '0px';
    }
    else {
        obj[id].style.visibility = 'visible';
        obj[id].style.height = 'auto';
    }
}