// Submenü im Hauptmenü
var basename="menu_";
var active=null;

hidemenu1();

function showmenu1(menu){

	// hide all submenus
	for (i=1;i<=10;i++){
		if (document.getElementById(basename + i)){
			document.getElementById(basename + i).className="lv1_inactive";
		};
		if (document.getElementById(basename + i + "_sub")){
			document.getElementById(basename + i + "_sub").style.visibility="hidden";	 
		};
	};
	
	// set this -> active
	document.getElementById(menu).className="lv1_active";
	
	// set this submenu active
		if (document.getElementById(menu+"_sub")){
			document.getElementById(menu+"_sub").style.visibility="visible";	 
		};
};

function hidemenu1(){
	// hide all submenus
		for (i=1;i<=10;i++){
		if (document.getElementById(basename + i)){
			document.getElementById(basename + i).className="lv1_inactive";
		};
		if (document.getElementById(basename + i + "_sub")){
			document.getElementById(basename + i + "_sub").style.visibility="hidden";	 
		};
	};
// keep active menu open
		if (active){
			showmenu1(active);
		};
};

function showmenu2(menu){

	// set this -> active
	if (document.getElementById(menu)){
		document.getElementById(menu).className="lv2_active";
	};
};

function showmenu3(menu){
	// set this -> active
	if (document.getElementById(menu)){
		document.getElementById(menu).className="lv3_active";
	};
};

function current(lv1,lv2,lv3){
	if (lv1){
	active= "menu_"+lv1;
	showmenu1("menu_"+lv1);
	};
	if (lv2){
	showmenu2("menu_"+lv1+"_"+lv2);
	};
	if (lv3){
	showmenu3("menu_"+lv1+"_"+lv2+"_"+lv3);
	};
		
};