//　読み込んだときに読み込む

if (document.images) {
   item1 = new Image(); item1.src = "./images/index/winery_btn01on.gif";
   item2 = new Image(); item2.src = "./images/index/winery_btn02on.gif";
   item3 = new Image(); item3.src = "./images/index/mail_btn01on.gif";
   item4 = new Image(); item4.src = "./images/index/mail_btn02on.gif";
   item5 = new Image(); item5.src = "./images/index/mail_btn03on.gif";
   item6 = new Image(); item6.src = "./images/index/search_btn1_on.gif";
   item7 = new Image(); item7.src = "./images/index/search_btn2_on.gif";
}

//　ロールオーバー
function setImage(img, image) {
   if (img) {
      img.src = image;
   }
}