var TimeOut         = 500;
var currentLayer    = null;
var currentitem     = null;
var currentLayerNum = 0;
var noClose         = 0;
var closeTimer      = null;

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