function getItem(id)
{
    var itm = false;
    if(document.getElementById)
        itm = document.getElementById(id);
    else if(document.all)
        itm = document.all[id];
    else if(document.layers)
        itm = document.layers[id];

    return itm;
}

function toggleItem(id)
{
    itm = getItem(id);

    if(!itm)
        return false;

    if(itm.style.display == 'none')
        itm.style.display = '';
    else
        itm.style.display = 'none';

    return false;
}