//galerie
var x = document.getElementById("sztaluga");
function duzy(elm,event) {
topstrony = document.documentElement.scrollTop;
posY = 20 + topstrony;
x.style.top = posY + "px";
adres = elm.src;
adresd = adres.replace(".jpg","_max.jpg");
x.innerHTML = "<img src='" + adresd + "'>";
x.style.visibility="visible"
}

function schowaj() {
x.style.visibility="hidden"
}