var TimeOut         = 300;
var currentLayer    = null;
var currentitem     = null;
var currentLayerNum = 0;
var noClose         = 0;
var closeTimer      = null;

function mopen(n) {
  var l  = document.getElementById("omenu"+n);
  var g  = document.getElementById("gs-navi"+n);
  var mm = document.getElementById("mmenu"+n);
  if(l) {
    mcancelclosetime();
    l.style.visibility='visible';
   //dropdownメニューの表示 
   var dwindow = getBrowserWidth();
   if(dwindow < 940){
        dwindow = 61;
       if(n == 1) l.style.left = (dwindow) + "px"; 
       if(n == 2) l.style.left = (dwindow + 140) + "px"; 
       if(n == 3) l.style.left = (dwindow + 280) + "px"; 
       if(n == 4) l.style.left = (dwindow + 420) + "px"; 
   }else{
       dwindow = (dwindow - 840) / 2;
       if(n == 1) l.style.left = (dwindow) + "px"; 
       if(n == 2) l.style.left = (dwindow + 140) + "px"; 
       if(n == 3) l.style.left = (dwindow + 280) + "px"; 
       if(n == 4) l.style.left = (dwindow + 420) + "px"; 
   }
   /*
   //メニューの表示
   document.getElementById("gs-navi1").style.left = '0px';
   document.getElementById("gs-navi2").style.left = '0px';
   document.getElementById("gs-navi3").style.left = '0px';
   document.getElementById("gs-navi4").style.left = '0px';
   
   document.getElementById("gs-navi1").style.visibility = 'hidden';
   document.getElementById("gs-navi2").style.visibility = 'hidden';
   document.getElementById("gs-navi3").style.visibility = 'hidden';
   document.getElementById("gs-navi4").style.visibility = 'hidden';
   g.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;