button1on = new Image();
button2on = new Image();
button3on = new Image();
button4on = new Image();
button5on = new Image();

button1off = new Image();
button2off = new Image();
button3off = new Image();
button4off = new Image();
button5off = new Image();


button1on.src = "./_img/main_b_ofirmie_off.jpg";
button2on.src = "./_img/main_b_dlaczego_off.jpg";
button3on.src = "./_img/main_b_realizacje_off.jpg";
button4on.src = "./_img/main_b_technologie_off.jpg";
button5on.src = "./_img/main_b_kontakt_off.jpg";


button1off.src = "./_img/main_b_ofirmie_on.jpg";
button2off.src = "./_img/main_b_dlaczego_on.jpg";
button3off.src = "./_img/main_b_realizacje_on.jpg";
button4off.src = "./_img/main_b_technologie_on.jpg";
button5off.src = "./_img/main_b_kontakt_on.jpg";

function podswietl(obraz){
pods = eval(obraz + "off.src");
document [obraz].src = pods;
}

function normalny(obraz){
norm = eval(obraz + "on.src");
document [obraz].src = norm;
}