    
    <!--
    /* test for objects */

        (document.layers) ? layerobject=true : layerobject=false;
        (document.all) ? allobject = true: allobject = false;
        (document.getElementById) ? dom = true : dom = false;
        function changeVisibility(id,action)
        {
        switch (action)
        {
        case "show":
        if (layerobject)
        document.layers[''+id+''].visibility = "show";
        else if (allobject)
        document.all[''+id+''].style.visibility = "visible";
        else if (dom)
        document.getElementById(''+id+'').style.visibility = "visible";
        break;
        case "hide":
        if (layerobject)
        document.layers[''+id+''].visibility = "hide";
        else if (allobject)
        document.all[''+id+''].style.visibility = "hidden";
        else if (dom)
        document.getElementById(''+id+'').style.visibility = "hidden";
        break;
        default:return;
        }
        return;
        }


    //-->