function find(item) {
    if (document.all) return(document.all[item]);
    if (document.getElementById) return(document.getElementById(item));
    return(false);
}

function display(id)
{
    var layer = find(id);
    layer.style.visibility = "visible";
}

function hide(id)
{
    var layer = find(id);
    layer.style.visibility = "hidden";
}