var selected_menu       = null;
var timer               = null;
/******
**  Almenu megjelenítése
******/
function unselect_menus() {
    for (i=1; i<=menu.length; i++) {
        var obj_id          = "menu_" + i;
        var element         = document.getElementById(obj_id);
        element.className   = "menu_normal";
    }
}



/******
**  Almenu megjelenítése
******/
function change_menu_onclick(akt_menu) {
        menu_out();
        unselect_menus();

        var obj_id          = "menu_" + akt_menu;
        var menu_id         = document.getElementById(obj_id);

        var obj_id          = "submenu_" + akt_menu;
        var submenu        = document.getElementById(obj_id);
        
        
        menu_id.className   = "menu_select";
        menu_id.blur();
        
        for (i=1; i<=menu.length; i++) {
                var obj_id = "submenu_" + i;
                document.getElementById(obj_id).style.display = "none";
            }
        submenu.style.display = "block";
}

function menu_over(akt_menu) {
       if (! selected_menu) {
            selected_menu = akt_menu;
       }
       timer = setTimeout("change_menu_timer()",1000);
}
function menu_out() {
        selected_menu = null;
        clearTimeout(timer);
}
function change_menu_timer() {
        //alert(selected_menu);
        if (selected_menu) {
            change_menu_onclick(selected_menu);
            selected_menu = null;
        }
}