Lay = new Array("menu-flip1","menu-flip2","menu-flip3","menu-flip4","menu-flip5","menu-flip6","menu-flip7");
LayBg = new Array("menu1","menu2","menu3","menu4","menu5","menu6","menu7");

var hideTimerID = 20;

function show(n) {
  clearInterval(hideTimerID);
  reset(n);
  document.getElementById(Lay[n]).style.visibility = "visible";
  document.getElementById(LayBg[n]).style.backgroundColor="#CCCCCC";
}
	
function hide(n) {
  hideTimerID = setInterval('executeHide('+ n +')',600);
}

function executeHide(n) {
  document.getElementById(Lay[n]).style.visibility = "hidden";
  document.getElementById(LayBg[n]).style.backgroundColor="#FFFF00";
  clearInterval(hideTimerID);
} 

function reset() {
  for (var i=0; i<Lay.length; i++) {
	executeHide(i);
  }
}