function switchAcc(obj, mainobj) {
    childs = document.getElementById(mainobj).childNodes;
    for(i = 0; i < childs.length; i++) {
        if(childs[i].className == 'accordion_content') childs[i].style.display = 'none';
    }

    if(document.getElementById(obj).style.display == 'block') {
        document.getElementById(obj).style.display = 'none';
    } else {
        document.getElementById(obj).style.display = 'block';
    }
}