function show_description(id) {
    var link  = document.getElementById("link_" + id);
    var descr = document.getElementById("descr_" + id);
    var linkclass = link.className;

    //descriptions auf display none setzen
    var tds = document.getElementById('descriptions').getElementsByTagName('td');
    for (i = 0; i < tds.length; i++) {
        if(tds[i].className != 'first') {
            tds[i].style.display = 'none';
        }
    }

    //klasse active aus den links nehmen
    var tds = document.getElementById('links').getElementsByTagName('td');
    for (i = 0; i < tds.length; i++) {
        tds[i].className = tds[i].className.replace(/active/i, '');
    }

    if (linkclass == id + ' active') {
        link.className = id;
        descr.style.display = 'none';
        document.getElementById("label").style.display = 'none';
    } else {
        link.className = id + ' active';
        descr.style.display = '';
        document.getElementById("label").style.display = '';
    }

}


function toggle_box(id) {
    box = document.getElementById(id);
    img = document.getElementById(id + '_img');
    path = img.src;
    path = path.split('/');
    site = path[path.length - 2];
    if (box.style.display == 'none') {
        box.style.display = 'block';
        img.src = '/images/' + site + '/item_arrow_down.gif';
    } else {
        box.style.display = 'none';
        img.src = '/images/' + site + '/item_arrow.gif';
    }
}