// Variablen
var countdown;
var aktiv = false;

// Funktionen
function showMenu(x) {
 if(aktiv != false){
  hideMenu();
 }
 window.clearTimeout(countdown);
 aktiv = x;
 document.getElementById("submenu"+x).style.visibility="visible";
}

function mouseOut(){
 countdown = window.setTimeout("hideMenu()",100);
}

function mouseOver(){
 window.clearTimeout(countdown);
}

function hideMenu() {
 document.getElementById("submenu"+aktiv).style.visibility="hidden";
}