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

/* 先読みする画像の配列 */
var images_ary=new Array(
'http://jjzwm.com/blog/images/menu_base.gif',
'http://jjzwm.com/blog/images/menu_now.gif',
'http://jjzwm.com/blog/images/menu_hover.gif',
'http://jjzwm.com/blog/images/spacer.gif'
);

/* 画像先読み処理関数 */
function preLoad(imgAry) {
  var imgMax=imgAry.length;
  var images=new Array(imgMax);

  for (var i=0; i<imgMax; i++) {
    images[i]=new Image();
    images[i].src=imgAry[i];
  }
}


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;