var TimeOut         = 400;
var currentLayer    = null;
var currentitem     = null;
var currentLayerNum = 0;
var noClose         = 0;
var closeTimer      = null;

function mopen(num) {
  var m  = document.getElementById("menu"+num);
  var mm = document.getElementById("mmenu"+num);
	
  if(m) {
    mcancelclosetime();
    m.style.visibility='visible';
    if(currentLayer && (currentLayerNum != num))
      currentLayer.style.visibility='hidden';
    currentLayer = m;
    currentitem = mm;
    currentLayerNum = num;			
  } else if(currentLayer) {
    currentLayer.style.visibility='hidden';
    currentLayerNum = 0;
    currentitem = null;
    currentLayer = null;
 	}
}

function mclosetime() {
  closeTimer = window.setTimeout(mclose, TimeOut);
}

function mcancelclosetime() {
  if(closeTimer) {
    window.clearTimeout(closeTimer);
    closeTimer = null;
  }
}

function mclose() {
  if(currentLayer && noClose!=1)   {
    currentLayer.style.visibility='hidden';
    currentLayerNum = 0;
    currentLayer = null;
    currentitem = null;
  } else {
    noClose = 0;
  }
  currentLayer = null;
  currentitem = null;
}

document.onclick = mclose;