var id_menu = new Array('sub_menu_1','sub_menu_2','sub_menu_3','sub_menu_4','sub_menu_5','sub_menu_6','sub_menu_7','sub_menu_8','sub_menu_9','sub_menu_10','sub_menu_11');
function allclose() {
    for (i=0; i < id_menu.length; i++){
        document.getElementById(id_menu[i]).style.display = "none";
    }
}
function openMenu(id){
    for (i=0; i < id_menu.length; i++){
        if (id != id_menu[i]){
            document.getElementById(id_menu[i]).style.display = "none";
        }
    }
    if (document.getElementById(id).style.display == "block"){
        document.getElementById(id).style.display = "none";
    }else{
        document.getElementById(id).style.display = "block"; 
    }
}