function show(d) {
    if (document.getElementById) { // DOM3 = IE5, NS6
        document.getElementById(d).style.visibility = "";
    } else {
        if (document.layers) { // Netscape 4
        document.d.visibility= "";
        } else { // IE 4
        document.all.d.style.visibility = "";
        }
    }
}


function hide(d) {
    document.getElementById(d).style.visibility = "hidden";
    if (document.getElementById) { // DOM3 = IE5, NS6
        document.getElementById(d).style.visibility = "hidden";
    } else {
        if (document.layers) { // Netscape 4
            document.d.visibility= "hidden";
        } else { // IE 4
          document.all.d.style.visibility = "hidden";
        }
    } 
}