var TikTak = 0;
var HideTime = 200;
var MaxMenuDivs = 10; 

function MenuOn(num) {
  ZrusZabal();
  SchovejVsechny();
  SM = document.getElementById("menu"+num);
  if (SM) { SM.style.visibility = "visible"; }
  }
  
function DoMenuOff(num) {
  SM = document.getElementById("menu"+num);
  if (SM) { SM.style.visibility = "hidden"; }
  }

function MenuOff(num) {
  TikTak = setTimeout("DoMenuOff("+num+");", HideTime)
 }

function ZrusZabal()
 {
  clearTimeout(TikTak)
 }
   
function SchovejVsechny() {
  for (i=0; i<MaxMenuDivs; i++) {
    DoMenuOff(i);
  }  
  }