if (document.images){

  menu1off = new Image;
  menu1off.src = "/images/menu/etlap.png";

  menu1on = new Image;
  menu1on.src = "/images/menu/etlap_a.png";

  menu2off = new Image;
  menu2off.src = "/images/menu/galeria.png";

  menu2on = new Image;
  menu2on.src = "/images/menu/galeria_a.png";

  menu3off = new Image;
  menu3off.src = "/images/menu/media.png";

  menu3on = new Image;
  menu3on.src = "/images/menu/media_a.png";

  menu4off = new Image;
  menu4off.src = "/images/menu/rendeles.png";

  menu4on = new Image;
  menu4on.src = "/images/menu/rendeles_a.png";

  menu5off = new Image;
  menu5off.src = "/images/menu/fooldal.png";

  menu5on = new Image;
  menu5on.src = "/images/menu/fooldal_a.png";

 }

 function MenuImgOn(imgName){
  if(document.images){
   imgOn = eval (imgName+"on.src");
   document[imgName].src = imgOn;}
 }

 function MenuImgOff(imgName){
  if(document.images){
   imgOff = eval (imgName+"off.src");
   document[imgName].src = imgOff;}
 }