function my_getbyid(id)
{
    itm = null;
    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 my_hide_div(itm)
{
    if ( ! itm ) return;
    itm.style.display = "none";
}

function my_show_div(itm)
{
    if ( ! itm ) return;
    itm.style.display = "";
}

function toggleview(id)
{
    if ( ! id ) return;
    if ( itm = my_getbyid(id) )
    {
        if (itm.style.display == "none")
        {
            my_show_div(itm);
        }
        else
        {
            my_hide_div(itm);
        }
    }
}