var timerId = 0;

function hideAllNow() {
  clearTimer();

  var ul = document.getElementById('nav');
  for (var itemi=0;itemi<ul.childNodes.length;itemi++) {
    var item = ul.childNodes[itemi];
    if (item.nodeName == "LI") {
      for (var sitemi=0;sitemi<item.childNodes.length;sitemi++) {
        var sitem = item.childNodes[sitemi];
	if (sitem.nodeName=="UL") { sitem.style.visibility='hidden'; }
      }
    }
  }
}

function hideAllDelayed() {
  timerId = setTimeout(hideAllNow,300);
}

function showMenu(item) {
  hideAllNow();
  for (var sitemi=0;sitemi<item.childNodes.length;sitemi++) {
    var sitem = item.childNodes[sitemi];
    if (sitem.nodeName=="UL") { 
      sitem.style.visibility='visible'; 
      var pos = item.offsetLeft + item.offsetWidth - 112;
      sitem.style.left=pos+'px';
    }
  }
}

function clearTimer() {
  if (timerId) {
    clearTimeout(timerId);
    timerId = 0;
  }
}