function prod(id, id_start, id_end) {

    for (var i = id_start, j, m; i <= id_end; i++) {
        if (i != id) {
            m = document.getElementById("onmouse_" + i);
            j = document.getElementById("border_" + i);
            j.style.display = "none";
            m.className = "";
        } else {

        document.getElementById("border_" + id).style.display = "block";
            document.getElementById("onmouse_" + id).className = "onmouse";
        }
    }
}