function settab(name, cursel, n) {
    for (i = 1; i <= n; i++) {
        var menu = document.getelementbyid(name + i);
        var con = document.getelementbyid("con-" + name + "-" + i);
        menu.classname = i == cursel ? "on": "";
        con.style.display = i == cursel ? "block": "none";
    }
}
function chosetab(name, cursel, n) {
    for (i = 1; i <= n; i++) {
        var menu = document.getelementbyid(name + i);
        var con = document.getelementbyid("con-" + name + "-" + i);
        menu.classname = i == cursel ? "up": "";
        con.style.display = i == cursel ? "block": "none";
    }
}