function menu(layername, type){
	if (document.getElementById){
		if (type){
			document.getElementById(layername).style.visibility="visible";
		} else {
			document.getElementById(layername).style.visibility="hidden";
		}
	}
}
/*
if(document.images){
	var imgs=new Array();
// ヘッダメニュー
	imgs[00]=new Image();imgs[00].src="images/nv_1.gif";
	imgs[01]=new Image();imgs[01].src="images/nv_1_f2.gif";
	imgs[02]=new Image();imgs[02].src="images/nv_2.gif";
	imgs[03]=new Image();imgs[03].src="images/nv_2_f2.gif";
	imgs[04]=new Image();imgs[04].src="images/nv_3.gif";
	imgs[05]=new Image();imgs[05].src="images/nv_3_f2.gif";
	imgs[06]=new Image();imgs[06].src="images/nv_4.gif";
	imgs[07]=new Image();imgs[07].src="images/nv_4_f2.gif";
// レイヤーメニュー
	imgs[20]=new Image();imgs[20].src="images/sv_1.gif";
	imgs[21]=new Image();imgs[21].src="images/sv_1_f2.gif";
	imgs[22]=new Image();imgs[22].src="images/sv_2.gif";
	imgs[23]=new Image();imgs[23].src="images/sv_2_f2.gif";
	imgs[24]=new Image();imgs[24].src="img/submenu/bt_recruit.gif";
	imgs[25]=new Image();imgs[25].src="img/submenu/bt_recruit_o.gif";
	imgs[26]=new Image();imgs[26].src="img/submenu/bt_vision.gif";
	imgs[27]=new Image();imgs[27].src="img/submenu/bt_vision_o.gif";
	imgs[28]=new Image();imgs[28].src="img/submenu/bt_officeservice.gif";
}

function chgimg(id, imgname){
	if(document.images){
		if(imgs[imgname]){
			document.images[id].src=imgs[imgname].src;
		}
		else{
			document.images[id].src=imgname;
		}
	}
}
*/
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}