loaded = 0;

//実行スクリプト
function SHOW(tgt){
 GETob(tgt);
 HIDEall();
 ob.visibility='visible';
 }

//全レイヤーを隠す
function HIDEall(){
 if(document.layers){
 document.layers['L01'].visibility = 'hidden';
 document.layers['L02'].visibility = 'hidden';
 document.layers['L03'].visibility = 'hidden';
 document.layers['L04'].visibility = 'hidden';
 }
 if(document.all){
 document.all('L01').style.visibility = 'hidden';
 document.all('L02').style.visibility = 'hidden';
 document.all('L03').style.visibility = 'hidden';
 document.all('L04').style.visibility = 'hidden';
 }
}

//レイヤー汎用オブジェクト取得
function GETob(LN){
 if(document.layers) ob = document.layers[LN];
 if(document.all) ob = document.all(LN).style;
}

//ロールオーバー
function rollimg(iName,iCode,iCheck){
 if(loaded==1){
 if(now==iCode){ void(0); }
 else{
  GETimg(iCode,iCheck);
  document.images[iName].src = getimg;
 }
 }
}

//状態管理
function nowimg(num){
 if(loaded==1){
 now = num;
 iName = 'i'+num;
 iCode = num;
 iCheck = 'p';
 GETimg(iCode,iCheck);
 document.images['i01'].src = 'img/01.gif';
 document.images['i02'].src = 'img/02.gif';
 document.images['i03'].src = 'img/03.gif';
 document.images['i04'].src = 'img/04.gif';
 document.images[iName].src = getimg;
 }
}

//画像汎用オブジェクト取得
function GETimg(iCode,iCheck){
 iHead = "img/";
 iFoot = ".gif";
 getimg = iHead+iCode+iCheck+iFoot;
}

//変数初期化
function start(){
 now = 0;
 loaded = 1;
}