function over(el, name) {
    el.style.background = "url(grafika/" + name + "_active.png)";
}

function out(el, name) {
    el.style.background = "url(grafika/" + name + ".png)";
}

function over_color(el) {
    el.style.backgroundColor = "#fe8900";
}

function out_color(el) {
    el.style.backgroundColor = "#6b6b6b";
}