var openedMenu = null;
	var submenuTimer;

	//画像メニューにポインタがきた時
	function menuOvr(id){

		// 開いているメニューと違うメニューであれば隠す。
		if (openedMenu && openedMenu != id)
			CloseMenu(id);

		// サブウィンドウの表示
		OpenMenu(id);
	}

	//レイヤメニューの表示
	function OpenMenu(id){ 

		if ( document.getElementById ) // NN6/7,Mozilla,IE5/6用
			document.getElementById( id ).style.visibility = 'visible' 
		else if ( document.all ) // IE4用
			document.all( id ).style.visibility = 'visible' 
		else if ( document.layers )  // NN4用
			document.layers[ id ].visibility = 'show' 

		clearTimeout(submenuTimer);

		openedMenu = id;

	}

	//レイヤメニューの削除
	function CloseMenu(){ 

		if ( document.getElementById )
			document.getElementById( openedMenu ).style.visibility = 'hidden' 
		else if ( document.all ) 
			document.all( openedMenu ).style.visibility = 'hidden' 
		else if ( document.layers )
			document.layers[ openedMenu ].visibility = 'hide' 

		openedMenu = null;

	}

	function ClickMenu(){
	
	}

function explainShow(idNo){  // 用語ポップアップ表示

  if(document.getElementById) {//NN6/7,Mozilla,IE5/6用
    document.getElementById('term'+idNo).style.backgroundColor = '#000000' 
    document.getElementById('term'+idNo).style.color = '#FFFFFF' 
    document.getElementById('exp'+idNo).style.visibility = 'visible' 
	}
  else if(document.all) {      //IE4用
    document.all('term'+idNo).style.backgroundColor = '#000000' 
    document.all('term'+idNo).style.color = '#FFFFFF' 
    document.all('exp'+idNo).style.visibility   = 'visible' 
  }  
  else if(document.layers){    //NN4用
    document.layers['term'+idNo].backgroundColor = '#000000' 
    document.layers['term'+idNo].color = '#FFFFFF' 
    document.layers['exp'+idNo].visibility     = 'show' 
  }
}

function explainHide(idNo){   // 用語ポップアップ消去

  if(document.getElementById) { //NN6/7,Mozilla,IE5/6用
    document.getElementById('term'+idNo).style.backgroundColor = '' 
    document.getElementById('term'+idNo).style.color = '' 
    document.getElementById('exp'+idNo).style.visibility = 'hidden' 
    }
  else if(document.all){       //IE4用
    document.all('term'+idNo).style.backgroundColor = '' 
    document.all('term'+idNo).style.color = '' 
    document.all('exp'+idNo).style.visibility = 'hidden' 
  }  
  else if(document.layers){    //NN4用
    document.layers['term'+idNo].backgroundColor = '' 
    document.layers['term'+idNo].color = '' 
    document.layers['exp'+idNo].visibility = 'hidden' 
  }
}

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_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_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];}
}

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}