if (document.images) {
       war1=new Image
       war2=new Image
       cen1=new Image
       cen2=new Image
       sza1=new Image
       sza2=new Image
       dru1=new Image
       dru2=new Image
       kon1=new Image
       kon2=new Image

       war1.src='images/menu_prawe_a_01.jpg'
       war2.src='images/menu_prawe_b_01.jpg'
       cen1.src='images/menu_prawe_a_02.jpg'
       cen2.src='images/menu_prawe_b_02.jpg'
       sza1.src='images/menu_prawe_a_03.jpg'
       sza2.src='images/menu_prawe_b_03.jpg'
       dru1.src='images/menu_prawe_a_04.jpg'
       dru2.src='images/menu_prawe_b_04.jpg'
       kon1.src='images/menu_prawe_a_05.jpg'
       kon2.src='images/menu_prawe_b_05.jpg'
        }

function zmiana(polerys,nowyrys){
       if(document.images){
              document[polerys].src=eval(nowyrys+".src")
       }
}