function ShowLayer(NSObj, MSObj) 
{ 
 if (navigator.appName == 'Netscape') {
      if (document.layers != null) 
         eval(NSObj+".visibility = 'show'");
  } 
  else { 
      if (document.all != null) 
         eval(MSObj+".style.visibility = 'visible'");
  }
}


function HideLayer(NSObj, MSObj) 
{ 
 if (navigator.appName == 'Netscape') {
      if (document.layers != null) 
         eval(NSObj+".visibility = 'hide'");
  } 
  else { 
      if (document.all != null) 
         eval(MSObj+".style.visibility = 'hidden'");
  }
}