function clean ()
{
  if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt (0)<'5'))
  {
  window.document.m1.visibility="hide";
  window.document.m2.visibility="hide";
  window.document.m3.visibility="hide";
  window.document.m4.visibility="hide";
  window.document.m5.visibility="hide";
  window.document.m6.visibility="hide";
  window.document.m7.visibility="hide";
  window.document.m8.visibility="hide";
  return;
  }
 if (navigator.appVersion.charAt (0)<'5')
    {  var layers=document.all.tags ("div");  }
 else 
    {  var layers=document.getElementsByTagName("div");  }
 layers[2].style.visibility='hidden';
 layers[4].style.visibility='hidden';
 layers[6].style.visibility='hidden';
 layers[8].style.visibility='hidden';
 layers[10].style.visibility='hidden';
 layers[12].style.visibility='hidden';
 layers[14].style.visibility='hidden';
 layers[16].style.visibility='hidden';
 return;
}

function menu (i)
{
switch(i)
 {
  case 1:
   {
    if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
     {  clean();  window.document.m1.visibility="show";  return;  }
    if (navigator.appVersion.charAt (0)<'5')
    {  var layers=document.all.tags ("div");  }
    else {  var layers=document.getElementsByTagName("div");  }
    clean();  layers[2].style.visibility='visible';  return;
   }
  case 2:
   {
    if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
      {  clean();  window.document.m2.visibility="show";  return;  }
    if (navigator.appVersion.charAt (0)<'5')
    {  var layers=document.all.tags ("div");  }
    else {  var layers=document.getElementsByTagName("div");  }
    clean();  layers[4].style.visibility='visible';  return;
   }
  case 3:
   {
    if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
      {  clean();  window.document.m3.visibility="show";  return;  }
    if (navigator.appVersion.charAt (0)<'5')
    {  var layers=document.all.tags ("div");  }
    else {  var layers=document.getElementsByTagName("div");  }
    clean();  layers[6].style.visibility='visible';  return;
   }
  case 4:
   {
    if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
      {  clean();  window.document.m4.visibility="show";  return;  }
    if (navigator.appVersion.charAt (0)<'5')
    {  var layers=document.all.tags ("div");  }
    else {  var layers=document.getElementsByTagName("div");  }
    clean();  layers[8].style.visibility='visible';  return;
   }
  case 5:
   {
    if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
      {  clean();  window.document.m5.visibility="show";  return;  }
    if (navigator.appVersion.charAt (0)<'5')
    {  var layers=document.all.tags ("div");  }
    else {  var layers=document.getElementsByTagName("div");  }
    clean();  layers[10].style.visibility='visible';  return;
   }
case 6:
   {
    if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
      {  clean();  window.document.m6.visibility="show";  return;  }
    if (navigator.appVersion.charAt (0)<'5')
    {  var layers=document.all.tags ("div");  }
    else {  var layers=document.getElementsByTagName("div");  }
    clean();  layers[12].style.visibility='visible';  return;
   }
case 7:
   {
    if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
      {  clean();  window.document.m7.visibility="show";  return;  }
    if (navigator.appVersion.charAt (0)<'5')
    {  var layers=document.all.tags ("div");  }
    else {  var layers=document.getElementsByTagName("div");  }
    clean();  layers[14].style.visibility='visible';  return;
   }
case 8:
   {
    if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
      {  clean();  window.document.m8.visibility="show";  return;  }
    if (navigator.appVersion.charAt (0)<'5')
    {  var layers=document.all.tags ("div");  }
    else {  var layers=document.getElementsByTagName("div");  }
    clean();  layers[16].style.visibility='visible';  return;
   }
  }
}