try { 
document.execCommand('BackgroundImageCache', false, true); 
} catch(e) {} 


/* ドロップダウンメニュー start */

var menuTimeOut         = 300;
var menuCurrentLayer    = null;
var menuCurrentitem     = null;
var menuCurrentLayerNum = 0;
var menuNoClose         = 0;
var menuCloseTimer      = null;

function menuOpen(n) {
//alert("00")
  var l  = document.getElementById("menu"+n+"LayerNavi");
  var mm = document.getElementById("gMenu"+n);
	
  if(l) {
    menuCancelclosetime();
    l.style.display='block';
    if(menuCurrentLayer && (menuCurrentLayerNum != n))
      menuCurrentLayer.style.display='none';
    menuCurrentLayer = l;
    menuCurrentitem = mm;
    menuCurrentLayerNum = n;			
  } else if(menuCurrentLayer) {
    menuCurrentLayer.style.display='none';
    menuCurrentLayerNum = 0;
    menuCurrentitem = null;
    menuCurrentLayer = null;
 	}
}

function menuClosetime() {
  menuCloseTimer = window.setTimeout(menuClose, menuTimeOut);
}

function menuCancelclosetime() {
  if(menuCloseTimer) {
    window.clearTimeout(menuCloseTimer);
    menuCloseTimer = null;
  }
}

function menuClose() {
  if(menuCurrentLayer && menuNoClose!=1)   {
    menuCurrentLayer.style.display='none';
    menuCurrentLayerNum = 0;
    menuCurrentLayer = null;
    menuCurrentitem = null;
  } else {
    menuNoClose = 0;
  }
  menuCurrentLayer = null;
  menuCurrentitem = null;
}

//document.onclick = menuClose; 

/* ドロップダウンメニュー end */