function ShowHide(id1, id2)
{
        if (id1 != '') toggleview(id1);
        if (id2 != '') toggleview(id2);
}
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 toggleview(id)
{
        if ( ! id ) return;
        if ( itm = my_getbyid(id) )
        {
                if (itm.style.display == "none")
                {
                        my_show_div(itm);
                }
                else
                {
                        my_hide_div(itm);
                }
        }
}
function my_show_div(itm)
{
        if ( ! itm ) return;
        itm.style.display = "";
}
function my_hide_div(itm)
{
        if ( ! itm ) return;
        itm.style.display = "none";
}