if (parseInt(navigator.appVersion)>= 4)
  {
    if (navigator.appName == "Netscape")
    {
        layerStyleRef="layer.";
        layerRef="document.layers";
        styleSwitch="";
    }
    else
    {
    layerStyleRef="layer.style.";
    layerRef="document.all";
    styleSwitch=".style";
    }
  }


function hid(layerName){
  if (parseInt(navigator.appVersion)>= 4)
  {
   eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
  }
}

function viz(layerName)
{
    if (parseInt(navigator.appVersion)>= 4)
    {
     eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
    }
}




function gb()
{
  if (theForm.name.value == "")
  {
   alert("Введите своё имя");
   theForm.name.focus();
   return (false);
  }

  if (theForm.text.value == "")
  {
   alert("Оставте сообщение");
   theForm.text.focus();
   return (false);
  }
 return(true);
}