if(navigator.appVersion.charAt(0) >= "3"){
  img = new Array();
  img[0] = new Image; img[0].src = "./image/what.gif";
  img[1] = new Image; img[1].src = "./image/what_chuokai.jpg";
  img[2] = new Image; img[2].src = "./image/what_chuokai_on.gif";
  img[3] = new Image; img[3].src = "./image/soshiki.jpg";
  img[4] = new Image; img[4].src = "./image/soshiki_on.gif";
  img[5] = new Image; img[5].src = "./image/gyoumu.jpg";
  img[6] = new Image; img[6].src = "./image/gyoumu_on.gif";
  img[7] = new Image; img[7].src = "./image/web.jpg";
  img[8] = new Image; img[8].src = "./image/web_on.gif";
  img[9] = new Image; img[9].src = "./image/taikai.jpg";
  img[10] = new Image; img[10].src = "./image/taikai_on.gif";
  img[11] = new Image; img[11].src = "./image/nisshi.jpg";
  img[12] = new Image; img[12].src = "./image/nisshi_on.gif";
  img[13] = new Image; img[13].src = "./image/QandA.gif";
  img[14] = new Image; img[14].src = "./image/what_kumiai.jpg";
  img[15] = new Image; img[15].src = "./image/what_kumiai_on.gif";
  img[16] = new Image; img[16].src = "./image/kyoudou.jpg";
  img[17] = new Image; img[17].src = "./image/kyoudou_on.gif";
  img[18] = new Image; img[18].src = "./image/seido.jpg";
  img[19] = new Image; img[19].src = "./image/seido_on.gif";
  img[20] = new Image; img[20].src = "./image/unei.jpg";
  img[21] = new Image; img[21].src = "./image/unei_on.gif";
  img[22] = new Image; img[22].src = "./image/kaikei.jpg";
  img[23] = new Image; img[23].src = "./image/kaikei_on.gif";
  img[24] = new Image; img[24].src = "./image/tetsuduki.jpg";
  img[25] = new Image; img[25].src = "./image/tetsuduki_on.gif";
  img[26] = new Image; img[26].src = "./image/houkoku.jpg";
  img[27] = new Image; img[27].src = "./image/houkoku_on.gif";
  img[28] = new Image; img[28].src = "./image/renrakuin.jpg";
  img[29] = new Image; img[29].src = "./image/renrakuin_on.gif";
  img[30] = new Image; img[30].src = "./image/jittai.jpg";
  img[31] = new Image; img[31].src = "./image/jittai_on.gif";
  img[32] = new Image; img[32].src = "./image/jigyou.jpg";
  img[33] = new Image; img[33].src = "./image/jigyou_on.gif";
}

var clearFlg=0;
var menuName="";

//nameはimgタグのnameに、indexはbodyタグ前の配列に対応
function BtnChg(name,index){
  if(navigator.appVersion.charAt(0) >= "3"){
    document.images[name].src=img[index].src;
  }
}

function setAll(mn){
	setFlag();
	menuName=mn;
}

function setFlag(){
	clearFlg=1;
}

function clearFlag(){
	clearFlg=0;
}

function clearSubMenu() {
	if ( menuName != "" && clearFlg == 0){
		hideLayer(menuName);
	}
}

function hiddenSubMenu() {
	clearFlag();
	window.setInterval("clearSubMenu()",3000);
}

// レイヤ表示
function showLayer(oj){ 
	getOj(oj).visibility='visible'; //NN,IE共用 
} 

// レイヤ非表示
function hideLayer(oj){
	getOj(oj).visibility='hidden'; //NN,IE共用 
}

function getOj(lyrName){ 
	var oj;
	if ( document.all ){
		oj = document.all(lyrName).style;	//IE4,IE5用
	} else if ( document.layers ){
		oj = document.layers[lyrName]; //NN4用
	} else if ( document.getElementById ){
		oj = document.getElementById(lyrName).style; //NN6用
	}
	return oj;
}