function show(id) {
        if (document.all[id].style.visibility == 'visible') {
            document.all[id].style.visibility = 'hidden';
                document.all[id].style.display = 'none';
        }
        else {
                document.all[id].style.visibility = 'visible';
                document.all[id].style.display = 'inline';
        }
}

function hide(id) {
    document.all[id].style.visibility = 'hidden';
        document.all[id].style.display = 'none';
}

function show_k(id) {
    document.all[id].style.visibility = 'visible';
        document.all[id].style.display = 'inline';
}

function hide_k(id) {
    document.all[id].style.visibility = 'hidden';
        document.all[id].style.display = 'none';
}