browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

if (browserVer >= 3) version = "Ver3";
   else version = "n2"

if (version == "Ver3")
  {
      Button1Off = new Image();
   Button1Off.src = "pic/o_nas_1.jpg";  // odkaz na první soubor
   Button1On = new Image();
   Button1On.src = "pic/o_nas_2.jpg";   // odkaz na druhý soubor
      Button2Off = new Image();
   Button2Off.src = "pic/vyrobky_1.jpg";  
   Button2On = new Image();
   Button2On.src = "pic/vyrobky_2.jpg";  
      Button3Off = new Image();
   Button3Off.src = "pic/konstrukce_1.jpg";  
   Button3On = new Image();
   Button3On.src = "pic/konstrukce_2.jpg";  
      Button4Off = new Image();
   Button4Off.src = "pic/sluzby_1.jpg";  
   Button4On = new Image();
   Button4On.src = "pic/sluzby_2.jpg"; 
      Button5Off = new Image();
   Button5Off.src = "pic/certif_1.jpg";  
   Button5On = new Image();
   Button5On.src = "pic/certif_2.jpg";   
      Button6Off = new Image();
   Button6Off.src = "pic/kontakty_1.jpg";  
   Button6On = new Image();
   Button6On.src = "pic/kontakty_2.jpg";  
      Button7Off = new Image();
   Button7Off.src = "pic/logo.gif";  
   Button7On = new Image();
   Button7On.src = "pic/logo_1.gif";  
      Button8Off = new Image();
   Button8Off.src = "pic/servis_1.jpg";  
   Button8On = new Image();
   Button8On.src = "pic/servis_2.jpg";  

}
function OverImage(imageName)
{ if (version == "Ver3")
  { gotFocus = eval(imageName + "On.src");
    document [imageName].src = gotFocus;
  }
}

function OffImage(imageName)
{ if (version == "Ver3")
  { lostFocus = eval(imageName + "Off.src");
    document [imageName].src = lostFocus;
  }
}