var menu;
var menu_alt;
var menutimer;

function show_menu(box)
{
	if(document.layers)
		document.layers[box].visibility="show";
	if(document.all) 
		document.all[box].style.visibility="visible";
      if(document.getElementById)      
		document.getElementById(box).style.visibility="visible";

}


function hide_menu(box)
{
	if(document.layers)
		document.layers[box].visibility="hide";
	if(document.all)
		document.all[box].style.visibility="hidden";
	if(document.getElementById)
		document.getElementById(box).style.visibility="hidden";

}

function menu_on(box)
{
	if(!menu)
		menu=menu_alt;

	if(menu!=box)
	{
		show_menu(box);
		menu=box;
	} else
		menu="";
}

function check_menu(box,Status)
{
if(Status == "on"){ 
		if(menutimer){ clearTimeout(menutimer) }
	}

	if(menu && menu!=box)
	{
		hide_menu(menu);
		show_menu(box);
		menu=box;
	}
}

function menu_off()
{
	if(menu)
		hide_menu(menu);

	menu_alt=menu;
	menu="";
}

function closemenu(Status)
{
if(Status == "off"){ 
menutimer = setTimeout("check_menu('liste0','on')", 500); }
}

//---------------------------

function change_txt(text)
{
 if(document.layers) 
   {
   document.ueberschrift.document.clear();
   document.ueberschrift.document.write('<font size=4 color=#000000 face=Tahoma,Verdana>' + text + '</font>');
   document.ueberschrift.document.close();
   }
 if(document.all)
   {
   document.all.uberschrift.innerHTML = text;
   }
 if(document.getElementById)
   {
   document.getElementById('uberschrift').innerHTML = text;
   }
check_menu('liste0','on'); 
}