var akt_id = 1;
var aktiv;

function thatLayer(obj){
   if(document.layers){
   	return document.layers[obj];
   	}

   if(document.all)
   	{
   	return document.all[obj].style;
   	}


   if(document.getElementById)
   	{
   	return document.getElementById(obj).style;
   	}
   }


function set_line(id){
thatLayer("nav" + akt_id).visibility="hidden";
thatLayer("nav" + id).visibility="visible";
akt_id=id;
}

function clear_line(){
thatLayer("nav" + akt_id).visibility="hidden";
}

function set_time(){
 aktiv=window.setTimeout('clear_line()',3000);
}

function clear_time(){
window.clearTimeout(aktiv);
}

function show_pic (MyFile, MyID, MyStyle){
	window.open(MyFile,MyID,MyStyle);
}