function setTag(n, cursel) {
    for (i = 1; i <= n; i++) {
        var menu = document.getElementById("li_links_" + i);
        var con = document.getElementById("div_links_" + i);
        menu.className = i == cursel ? "seled" : "sel";
        con.style.display = i == cursel ? "block" : "none";
    }
}